The table below contains characteristics of four different elements. Characteristics of Four Elements Element Number of Protons Number of Valence Electrons 1 ca 4 2. 11 1 1 3 18 8 4 37 1 1 What conclusion can be made from the information above? Element 3 is a metal and Element 1 is a metalloid. Element 2 is the same element as Element 3. Element 1 has very similar chemical properties as Element 4. Element 2 has very similar chemical properties as Element 4.

Answers

Answer 1

Answer:

The correct option is "Element 2 has very similar chemical properties as Element 4"

Explanation:

Both element 2 and element 4 have the same number of valence electrons; meaning they will be found in the same group (group 1) of the periodic table. Elements in the same group of the periodic table exhibit similar chemical properties. For confirmation, element 2 is sodium (based on the atomic number of 11 provided) while element 4 is rubidium (based on the atomic number of 37 provided) - the two elements are found in group 1 of the periodic table.

NOTE: Number of protons is the same as atomic number

Related Questions

Which object is an insulator?

A. Iron

B. Copper

C. Plastic

D. Salt water

Answers

Answer:

c. plastic is an insulator

Explanation:

a and b are metals which are conductors and d contains water which is also a conductor

As you were climbing a a mountain, you noticed that rocks were crumbling below your feet and moving down the mountain. What two processes did you observe?

Answers

Answer:

Weathering and erosion

Explanation:

Weathering can be explained as the breaking down of rocks/minerals on the surface of the Earth as a result of contact with biological organism, water, air and other factors

. There are 3 common types of weathering which are;

1) physical weathering

2) biological weathering

3) chemical weathering

Erosion can be regarded as a geological process, whereby earthen material are been transported away by natural forces, these forces could be wind as well as water.

Therefore, as you were climbing a a mountain, you noticed that rocks were crumbling below your feet and moving down the mountain. What is observed are weathering and erosion processes.

After the weakening and broken up of the rock by weathering then erosion transport the bit of the rock down the mountain as you are climbing, which means the "weathering process" breakdown and the "erosion process" involves the transport or movement of the bit of the rocks

PLEASE HELP ME ANSWER THE TWO MULTIPLE CHOICE QUESTIONS!!!

ITS FOR CHEM:(

I’LL GIVE BRAINIEST:)

Answers

Answer:

4.D. 2KJ

5.B. close to 0 degree celsius

Explanation:

heat absorbed= heat given out

100g * 4.2 * (x-0)= 400g * 4.2* ( 20-x) where x is the new temp reached

then x= 20

i.e. the temperature of ice increases to 5 degree celsius and the temperature of water decreases to 5 degree celsius .

hope it helps

i need help people :0

Answers

install a ceiling fan , and avoid wasting water.

what is the soul of water?

Answers

Answer:

soul eater is a social enterprise

Explanation:

they donate a minimum of 10 percent to the soul community . soul water was born from the idea that everyone should be able to enjoy quality drinking tap water

asthenosphere
OA.
oceanic continental convergent boundary
B.
oceanic-oceanic convergent boundary
O c.
divergent boundary
D.
transform boundary
Awnser I know if ur right I’ll mark brainlesst

Answers

Answer:C

Explanation:The samples are composed of different proportions of copper and zinc

can someone help me with this

Answers

Location A. 0.7g/mL will have a lesser density compared to the other ones, meaning the object will float instead of sink. If the density is higher, like 0.9, then the object will sink until it hit location B, then it would start to float again.

1. Calculate the amount of heat required for 25.0 grams of water tochange from 10 degrees Celsius to 30 degrees Celsius.

2. 50.0 grams of water at 100 degrees Celsius evaporated to water vapor 2 points
at 100 degrees Celsius. Calculate the amount of heat required for this
conversion.

3. A student measured 15.0 grams of ice in a beaker. The beaker was then
placed on a hot plate where it was heated uniformly for a certain amount
of time. During the melting process of the ice, the student noted that the
temperature was at 0 degree Celsius. When all the ice converted to water,
the final temperature was also at 0 degree Celsius. How much heat was
used to melt the ice?

4. If 5.0 grams of water was cooled from 50 degrees Celsius to 40
degrees Celsius, then calculate the amount of heat released by the water.

5. A certain amount of water used exactly 84.0 Joules of heat energy to
change from 25.0 degrees Celsius to 35 degrees Celsius. How many
grams of water was used?

Please help me

Answers

Answer:

Explanation:

1 )

amount of heat required = mass x specific heat x rise in temperature

= 25 x 4.2 x 20 = 2100 J .

2 )

Amount of heat required

= mass x latent heat of vaporisation

= 50 x 2260 = 113000 J .

3 )

Amount of heat required in melting the ice

= mass x latent heat of fusion

= 15 x 336 = 5040 J

heat released in cooling water

= mass x specific heat x fall in temperature

= 5 x 4.2 x 10

= 210 J

5 )

amount of heat required = mass x specific heat x rise in temperature

84 = mass x 4.2 x 10

mass = 2 grams .

Objects with more (less or more) molecules have
heat energy than objects with (greater or fewer)
molecules? fill in the blanks

Answers

More heat energy; fewer molecules
Because the more molecules the more heat is produced.

what are the 3 types of bonds in chemistry? and how can you tell when a chemical has that bond?

Answers

Answer:

Ionic bonding, Covalent bonding, Metallic bonding.

» My memory

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds. » Wikipedia

Urgent !!!!!!!!!! Due today plzzzzz help me

Answers

Answer:

Explanation:

a. H3O+

b. H3O+

c. CH3C(OH2)+

Compare the viscosity property of solid and liquid.

Answers

Answer

There is nothing like viscosity in solid because most of the solids usually have a rigid body. This is due to strong intermolecular forces. And it is due to this strong force between the molecules that they are unable to move and they remain fixed at their position. Some solids such as graphite which have layered structure, don't possess the property of viscosity, because of the strong force between the layers.

Explanation:

Viscosity is the property of a fluid that opposes the relative motion between two surfaces of the fluid that are moving at different velocities. In simple terms, viscosity means friction between the molecules of fluid.

[tex]P_{water}[/tex] = Vapor pressure = 40 mmHg

[tex]P_{gas}[/tex] = Pressure of gas

The total pressure in a system is given by Dalton's law

[tex]P_{total}=P_{gas}+P_{water}\\\Rightarrow P_{gas}=P_{total}-P_{water}\\\Rightarrow P_{gas}=751-40\\\Rightarrow P_{gas}=711\ \text{mmHg}[/tex]

The partial pressure of the hydrogen is [tex]711\ \text{mmHg}[/tex]

Fluorine (F) and bromine (Br) are in the same group on the periodic table. How do atoms of these elements compare when they form bonds?

Both a fluorine atom and a bromine atom lose one electron, and both atoms become stable.
A fluorine atom becomes stable by losing one electron, but a bromine atom cannot become stable by losing only one electron.
Both a fluorine atom and a bromine atom gain one electron, and both atoms become stable.
A fluorine atom becomes stable by gaining one electron, but a bromine atom cannot become stable by gaining only one electron.

Answers

Answer:

Both a fluorine atom and a bromine atom gain one electron, and both atoms become stable.

Explanation:

The two elements compare when they form bonds in that when both a fluorine atom and a bromine atom gain one electron, they both become stable.

Fluorine and bromine are elements called halogens. They both belong to group 7 on the periodic table. When they gain an electron each, they become isoelectronic with a corresponding noble gas. This gives their atom special stability.

Answer:

3) Both a fluorine atom and a bromine atom gain one electron, and both atoms become stable

Explanation:i got it right on the quiz

hope this helps

How much water (H2O ) would form if 4.04 g of hydrogen (H2) reacted with 31.98 g of oxygen (O2 )?
(2H2 + O2 2H2O)

Answers

Answer:

Mass = 36 g

Explanation:

Given data:

Mass of water formed = ?

Mass of hydrogen = 4.04 g

Mass of oxygen = 31.98 g

Solution:

Chemical equation:

2H₂ + O₂ → 2H₂O

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 4.04 g/ 2 g/mol

Number of moles = 2.02 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 31.98 g/ 32 g/mol

Number of moles = 1.0 mol

Now we will compare the moles of water with hydrogen and oxygen.

O₂ : H₂O

1 : 2

H₂ : H₂O

2 : 2

2.02 : 2.02

Number of moles of water formed by oxygen are less thus oxygen will limiting reactant.

Mass of water:

Mass = number of moles × molar mass

Mass = 2 mol × 18 g/mol

Mass = 36 g

which statement is true of the particles that make up a substance?
a. Particles in a liquid and particles in a solid have the same amount of energy
b. Particles in a solid have more energy than particles in a gas
c. Particles in a gas have more energy than particles in a liquid
d. Particles in a liquid have more energy than particles in a gas.

Answers

Answer: particle in gas have more energy than the particles in a liquid

Explanation: this is because the amount of energy is directly proportional to how random the system is. gaseous molecules are in a more constant random motion than the liquid molecules

Help please !
A
B
C
D

Answers

Answer:

the answer is letter B. the entropy

Answer:B (the entropy of the gas will increase, and it will spread out to fill both containers) is the correct answer

The most stable group of elements on the periodic table is the?
A) halogens
B) noble gases
C) alkali earth metals
D) alkaline earth metals

Answers

Answer:

Noble Gases B

Explanation:

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.

B) Noble gases
Most stable because they have the maximum number of valence electrons their outer shell can hold

Chemical and physical element properties are determined by their valence electrons. How do you describe metals with only one valence
electron?
A .highly reactive
B. poor conductors of electricity
C. reactive with other metals
D. likely to gain more electrons

Answers

Answer:

Explanation:

Chemical and physical element properties are determined by their valence electrons metals with only one valence electron are poor conductors of electricity. Option B is correct.

What are valance electrons?

Valence electrons are the electrons present at the valance shell or orbit of the atom and always take part in the chemical reaction or reaction with other metals and can conduct electricity.

What is the chemical equation( formula ) of the reaction of photosynthesis

Answers

Answer:

The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2.

Explanation:

This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

How do I find the formula for Phosphorus Tetroxide

Answers

Formula= P4O6
You are going to want to flip the elements subscripts with one another.
P6O4
P will just stay as phosphorus, but since oxygen has 4 atoms, itbwill become tetroxide

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