Is the modern periodic table arranged based on atomic mass?
HELPP ILL GIVE BRAINLIEST

Is The Modern Periodic Table Arranged Based On Atomic Mass? HELPP ILL GIVE BRAINLIEST

Answers

Answer 1

Answer: its b

Explanation:


Related Questions

Which element in Group 18 of the Periodic Table has the highest lonization energy?

Answers

all the elements in group 18 are Nobel gases or inert gases . all the elements such as neon , helium, argon etc. ,their outermost shell is completely filled . The noble gases have the largest ionization energies, reflecting their chemical inertness

Elements in group 17 want to lose seven valence electrons and elements in group 1 want to gain seven valence electrons to become stable ions.

Answers

Because the halogen elements have seven valence electrons, they only require one additional electron to form a full octet. This characteristic makes them more reactive than other non-metal groups. hope it helped

What would the formula be for Molybdenum V Carbonate?

Answers

Answer:

CMoO3 - PubChem.

Explanation:

help with this asap please

Answers

ΔH rxn = 434.7 kJ

Further explanation

Given

C+O₂⇒CO₂   ΔH=-393.5 (reaction 1)

2CO+O₂⇒2CO₂  ΔH=-566 (reaction 2)

2H₂O⇒2H₂+O₂ ΔH=483.6 (reaction 3)

Required

ΔH rxn

Solution

Reaction 1 : no change

C+O₂⇒CO₂   ΔH=-393.5

Reaction 2 : the reaction is reversed and divided by 2

CO₂⇒ CO+1/2O₂ ΔH=-283

Reaction 3 : divided by 2

H₂O⇒H₂+1/2O₂ ΔH=241.8

-------------------------------------------

C+H₂O⇒CO + H₂ ΔH rxn= -434.7 kJ

Please help!! I was sick when he went over this

Answers

Answer:

5.70×10^-11 m

Explanation:

Using principles of atomic structure, explain why the atomic radius of Te is less than the ionic radius of Te2− . Photoelectron spectroscopy data for the 1s sublevel of Te and the 1s sublevel of O are represented below. In terms of Coulomb's law and atomic structure, explain why the peak for O is positioned so far to the right of the peak for Te .

Answers

Answer:

See explanation

Explanation:

Let us recall that a negative ion is formed by addition of electrons to an atom. When electrons are added to the atom, greater interelectronic repulsion increases the size of the Te^2− hence it is greater in size than Te atom. Therefore, the ionic radius of Te^2− is greater than the atomic radius of Te.

In the second question, oxygen is positioned so far to the right because it has a far smaller nuclear charge compared to Te. Hence in the PES spectrum, the 1s sublevel of oxygen lies far to the right of that of Te.

Using principles of atomic structure, the reason why the atomic radius of Te is less than the ionic radius of Te²− is because of the Electrostatic force of repulsion between the negatively charged electrons of Te²- thereby causing the ion to be bigger than the neutral atom.

We must remember that negative ions are formed as a result of the addition of electrons to an atom.

On this note, the electrostatic force of repulsion between the negatively charged electrons of Te²- ion becomes greater. Hence, the Te atomic radius is less than the ionic radius of the Te²- ion.

By considering the second scenario, the element oxygen is positioned so far on the right because it has a very much smaller nuclear charge compared to Te.

As a result, in the PES spectrum, the 1s sublevel of oxygen lies far to the right of the 1s sublevel of Te.

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Help pls!
How can you use a chemical reaction to remove a contaminant from a solution?

Answers

Answer:

reverse osmosis

Explanation:

Water treatment is often complicated because it deals with the chemical makeup of the water, which varies widely. The first step is to determine what contaminants should be removed. Unfortunately, this is not always a straightforward process. Many contaminants make themselves known in obvious ways, such as iron or hydrogen sulfide, which can cause taste and odor issues. Other contaminants, such as arsenic or pesticides, are only uncovered through a sophisticated laboratory analysis.

It is important to test the water so that the right type of treatment system can be selected. Keep in mind, however, that more than one analysis may be necessary to get a baseline because water quality fluctuates. More information on possible contaminants in a specific area can be obtained by talking to residents, the local health department, the water department, or the state geological society. In addition, your laboratory should be able to recommend appropriate tests based on a customer’s concerns and the information provided about the water source. It is important not only to address customers’ concerns but also to educate them about potential contaminants they may not have considered.

A chemical reaction that has the general formula of AB + C → CB + A is best classified as a
synthesis
polymerization
decomposition
oxidation
replacement
reaction.

Answers

Replacement  reaction.

Further explanation

Given

A chemical reaction

AB + C → CB + A

Required

reaction type

Solution

There are several types of reactions that can occur

synthesis: 2 elements combine to form a single product

polymerization: monomers combine to produce a polymer

decomposition: One compound breaks down into 2 components

oxidation : a change in oxidation number

replacement can be divided into 2

single replacement if one element replaces the other elements of a compound

double replacement if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds

AB + C → CB + A

If we look at this reaction, element C replaces element A to form a new compound CB. So it is single replacement. But this reaction can also be said to be an oxidation-reduction reaction because there is a change in oxidation number

element A undergoes a reduction reaction

element C undergoes an oxidation reaction

So types of redox reactions can be combination, decomposition, displacement, combustion, and disproportion.

Answer:

oxidation

Explanation:

i passed and got 100%

how does reducing the temperature of chemical reaction affect the rate at which it occurs?

Answers

Answer:

When you lower the temperature, the molecules are slower and collide less. That temperature drop lowers the rate of the reaction. When you increase the pressure, the molecules have less space in which they can move. That greater density of molecules increases the number of collisions.

Explanation:

would u like to do a zoom?

If u can...

im just bored and my friend fell asleep on me :/

Temperature measures the average kinetic energy of particles of the substances. Therefore,  reducing the temperature of chemical reaction reduces  rate of reaction.

What is temperature?

Temperature is used to measure degree or intensity of heat of a particular substance. Temperature is measured by an instrument called thermometer.

Temperature can be measured in degree Celsius °c, Kelvin k or in Fahrenheit. Temperature is a physical quantity. Heat always flow from higher temperature source to lower temperature source.

When the temperature is reduced, the molecules move more slowly and collide less. The reaction's pace is slowed as the temperature drops. When the pressure is increased, the molecules have much less area to travel in. The number of collisions rises as the density of molecules increases.

Therefore,  reducing the temperature of chemical reaction reduces  rate of reaction.

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HELP ASAP
1. a hurricane destroyed an entire city, what category would it most likely be?

a Category 4 or 5


b Category X or Y


c Category 1 or 2

d Category A or B
2. What happens immediately after a hurricane makes landfall?

a It starts hailing.


b Its winds pick up speed.


c It gets stronger.


d It gets weaker.

Answers

Answer:

1. category 4 or 5

2. it gets weaker

Do the earth plates ride on the crust or mantle?

Answers

Answer:

Mantle

Explanation:

The crust is also known as earths tectonic plates

Can someone help me please!(I will mark you brainliest)

Answers

Answer:

ok Look at it and tell me if you think its correct :}

EMERGENCY!!! Can someone tell me the answer plz plz I’ll give you brainlist and points plz This is my final test No wrong answers

Answers

Answer:

A. the valence electrons

Explanation:

Answer:

The valence electrons

Explanation:

The valence electrons determine an element's properties because chemical properties of each element are determined by the element's electronic configuration and PARTICULARLY by its outermost valence electrons. I hope it helps!

                      ~Good luck

Metallic bonds are formed because valence clectrons are -

A. Fixed to each metal atom

B. Shared between many metal cations

Answers

Answer:a is the answer

Which of the following methods can be used to completely separate a solution containing alcohol and water?

A) Evaporation and distillation
B) Filtration
C)Floatation or centrifuge
D) Magnetism

Answers

A) i think is the answerrrrr

what is the structural formula of propene

Answers

Explanation:

Structural formula of propene

H₃C–CH₂=CH

molecular formula = C₃H₆

molecular mass = 12×3+1×6 = 36+6 = 42

no. of double bond = 1

can i have some help :'(







manganese atom has 30 neutrons and atomic number 25
calculate the atomic mass of manganese atom​

Answers

The atomic mass of manganese atom​ : 55

Further explanation

Given

Manganese (Mn) atom has 30 neutrons

atomic number 25

Required

the atomic mass

Solution

The atomic mass=number of protons+number of neutrons

The atomic number = number of protons=number of electrons

The number of protons=25, so the atomic mass :

[tex]\tt =ptotons+neutrons\\\\=25+30\\\\=55[/tex]

hi does anyone know what the answer to this is? i really need help

Answers

Answer:

The answer is

H. Met, Val, Lys, Arg, Gin, Ser

Explanation:

Classify each of the following elements as
a metal, a nonmetal, or a metalloid:
boron, carbon, aluminum, and silicon.

Answers

The non-metals are boron and carbon. The metal is aluminum and the metalloid is silicon.

Explanation:

non-metal = boron, carbon

metal = aluminum

metalloid = silicon

Non-metal = boron, carbon

Metal = aluminum

Metalloid = silicon

What is metal?

A solid material which is lustrous, hard, shiny, malleable, and sonorous with good electrical and thermal conductivity.

Metal is an element which is typically hard, shiny, fusible, malleable, and ductile, with good electrical and thermal conductivity.

A nonmetal is an element that does not have the properties of a metal.

A metalloid is an element having intermediate properties of both metals and nonmetals.

Hence,

Non-metal = boron, carbon

Metal = aluminum

Metalloid = silicon

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The three types of ocean floor sediments are classified according to their _____.

Answers

Answer:

Origin

Explanation:

It’s origin. Good luck !

What happens when you put an ice-pop outside? This is for the people who don’t know

Answers

Answer:

It melts

Explanation:

Answer:

It melts?

Explanation:

What occurs during replication?
O A protein is formed from information in messenger RNA.
A messenger RNA strand is made from DNA.
O A copy of DNA is made from existing DNA.
A copy of DNA is transferred from one organism to another.

Answers

Answer:

A

Explanation:

Hopefully this helps

Answer:

A copy of DNA is made from existing DNA.

Explanation:

Just did the quiz

what unit is a wave velocity measured in

Answers

Answer:

radians

Explanation:

Answer:

Meters per second.

Explanation:

Ap3x approved

Which of the following are common decomposers? (Select all that apply) fungi, ferns, bacteria, viruses, grasses​

Answers

Answer:

Fungi, bacteria, ferns,

Explanation:

bacteria Fungi Ferns are important. decomposers,

I hope it helps you.

There are basically four different categories of decomposers: fungi, insects, earthworms, and bacteria. Fungi, ferns and bacteria are common decomposers.

What are decomposers ?

Decomposers are organisms that disintegrate rotting or dead species; they carry out decomposition, a process only some kingdoms, like fungi, are capable of.

The primary decomposers in nature are fungi, which destroy organic material that would otherwise not be recycled.

Scavengers and decomposers are the two different categories of decomposers. Animals called scavengers hunt down dead plants or animals and consume them. They cut them into small pieces when they eat them.

Each contributes to the food recycling process differently. To transform dead plants or animals into simple substances, fungi release compounds. Some of these elements are absorbed by them for growth, while others go into the soil.

Thus, Fungi, ferns and bacteria are common decomposers.

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An apple, potato, and onion all taste the same if you eat them with your nose plugged
true or false


i know the answer do you?

Answers

Answer:

Ummm it would just be indistinguishable ..and i don’t think u well taste when u plug your nose so ldk but ig it is true let me know if am wrong

Explanation:

This table shows the pH values of different solutions. A 2-column table with 4 rows. The first column labeled solution has entries W, X, Y, Z. The second column labeled p H has entries 6, 5, 1, 3. Which ranks the solutions from the strongest to weakest acid? W X Y Z Y W X Z W X Z Y Y Z X W

Answers

Answer:

D-  Y -Z -X -W

:)

The solution with lowest pH are more acidic and those with higher pH values are basic. The given solutions can be ranked from the strongest to weakest acid as Y Z X W.

What is pH?

pH of a solution is the measure of its H+ ion concentration. Mathematically it is the negative logarithm of H+ ion concentration of the solution. The acidic solutions contains more H+ ions.

A pH value of 7 represents a neutral solution. The pH above 7 is basic solution and a solution with pH below 7 is acidic in nature. A pH scale can be used to measure the range.

The pH of 1  and 3 indicates strong acidic solutions and 5 and 6 are weakly acidic . The lowest value of pH indicates highest acidity. Therefore, the correct order is Y Z X W.

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What are the characteristics for mechanical waves

Answers

wavelength, amplitude, time period, frequency and velocity or speed
requires a medium, can’t travel in empty space, low speed, compressional, longitudinal, can travel through opaque objects, water waves, seismic & sound
hope this helps :)

Julio measured the weight of a grain of sand and found it to be 3.5 times 10 Superscript negative 10 kg. He also measured the weight of one hair from his eyebrow and found that to be 7 times 10 Superscript negative 8 kg.

What is the total weight of both objects?
3.507 times 10 Superscript negative 10 kg
7.035 times 10 Superscript negative 10 kg
3.507 times 10 Superscript negative 8 kg
7.035 times 10 Superscript negative 8 kg

Answers

The total weight of both objects : 7.035 x 10⁻⁸ kg

Further explanation

Given

The weight of a grain of sand : 3.5 x 10⁻¹⁰ kg

The weight of one hair from his eyebrow : 7 x 10⁻⁸ kg

Required

The total weight of both objects

Solution

Scientific Notation consists of 2 parts  

1. the first part: the first digit followed by the decimal point  

2. The second part: the power of 10 (the exponents).which shows the number of digits after the decimal point  

To add/subtract, the exponents must be the same and then add/subtract the coefficient

convert the largest exponent  (7 x 10⁻⁸)

7 x 10⁻⁸ = 700 x 10⁻¹⁰

add the coefficients  

[tex]\tt =(3.5+700)\times 10^{-10}\\\\=703.5\times 10^{-10}\\\\=7.035\times 10^{-8}[/tex]

 

Answer:

in other words its: d

Explanation:

A student calculates the density of an unknown solid. The mass is 10.04 grams, and the volume is 8.21 cubic centimeters. How many significant figures should appear in the final answer

Answers

Answer:

1.22 g/cm³

Explanation:

Density = mass ÷ volume

Mass = 10.04 grams

Volume = 8.21 cubic centimeters

Density = mass ÷ volume

= 10.04 ÷ 8.21

= 1.2228989037758 g/cm³

Approximately

1.22 g/cm³ to 2 significant figure.

The final answer should be approximated to 2 significant figure because the mass and volume of the objective given is in 2 significant figure

The chemical formula for the ionic compound aluminum sulfite is Al2(SO3)3. Explain why there are 2 cations for every 3 anions in this compound.

Please help lol

Answers

Answer: It is a 2:3 ratio because Al has a +2 charge and S and O both have a -2 charge. It takes 2 Al to bring 3 SO3 to a neutral state.

Explanation:

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