Select all that apply. Using your periodic table of the elements which chemical symbols indicate an element?

Question 5 options:
O

I

i

Ca

Answers

Answer 1

Answer:

O, I, Ca

Explanation:


Related Questions

1000 cm3 of Helium has a mass of 178.5 grams. What is the density of Helium gas?​

Answers

Answer:

The answer is 0.18 g/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{178.5}{1000} \\ = 0.1785[/tex]

We have the final answer as

0.18 g/cm³

Hope this helps you

In geotropism, give examples of a positive and a negative response in a seedling?

Answers

Answer:

I don't know that question answer because I am in 7 class so mind it

Answer:

Positive Geotropism means growth of the plants towards the Gravitational force. e.g.It means When a plant's root grows towards Gravitational force . It is positive geotropism. Negative Geotropism means growth of the plant against the Gravitational force. e.g. When a plant's steam grows towards sunlight.

Explanation:

The ocean both absorbs and releases heat more slowly than land does

True or false.

Answers

Answer: False
Explanation: The specific heat of water is greater than that of dry soil, therefore water both absorbs and releases heat more slowly than land

Please help me
What will oxygen likely do to complete its outermost shell, based on the Lewis dot diagram shown?

accept electrons
accept some electrons and give up other electrons
move electrons from the inner shell to the outer shell
give up electrons

Answers

Answer:

A. Accept electrons

Explanation:

The octet rule states that 8 electrons stabilizes a molecule. This means that oxygen will try to fill the two empty spots with electrons from other molecules. The Lewis Dot diagram shows these two empty spots with the empty circles at the bottom.

Lewis dot structures, also known as electron dot structures, are schematics that show the interatomic chemical bonds in a molecule. Additionally, they show how many lone pairs there are overall in each of the atoms that make up the molecule. Here 'O' accepts electrons. The correct option is A.

The electrical structures of the elements, especially the electron pairings, are reflected in the Lewis dot structures. Lewis structures can be viewed as "electron bookkeeping" and are a helpful approach to condensing some bonding-related information. Each dot in a Lewis dot structure corresponds to 1 electron.

Group 6 member oxygen still requires two additional electrons to complete its outer shell and remain stable. According to the octet rule, an object needs 8 valence electrons in the outer shell to be stable.

Thus the correct option is A.

To know more about Lewis dot diagram, visit;

https://brainly.com/question/34127343

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in any study of energy, energy conversion is not important. true false

Answers

Answer:

I think its false

Explanation:

Any energy is important

Hope this helps <3

Answer:

In any study of energy, energy conversion is not important.  Heat energy that is lost cannot usually be used to produce work.

Explanation:

Hope this helps!

If so, please mark BRAINLIST!!

thx

Are these correct?? Help please

Answers

yeah they are correct

CHEM ASSIGNMENT!!

PLEASE HELP

Answers

Answer:

Explanation:

q=mcat

q= 50g(4.184)(100-100)

q = 0

What did the Curies demonstrate by studying pitchblende?
A- Uranium is not the only radioactive element.

B- All elements are potentially radioactive.

C-Radium can cause anemia, bone and tissue damage, and death.

D-Uranium salts emit something that can expose photographic film.

Answers

Answer:

A- Uranium is not only the radioactive element

what is the conclusion of Rutherford atomic model?​

Answers

Most of the space inside the atom is empty because most of the α-particles passed through the gold foil without getting deflected. Very few particles were deflected from their path, indicating that the positive charge of the atom occupies very little space.

You

2. An all natural mosquito repellent

is trying to make its way into the

market. One arm is sprayed with the

repellent and one arm is not sprayed

with anything. After 3 hours, the

number of mosquito bites is counted. What is the control group

Answers

Answer:

The arm that was not sprayed with anything

Explanation:

The control group would be the arm that was not sprayed with anything.

The control group during an experiment is a group that forms the baseline for comparison in other to determine the effects of a treatment. The control group does not include the variable that is being tested and as such, it provides the benchmark to measure the effects of the tested variable on the other group - the experimental group. In this case, the experimental group would be the arm that was sprayed with the repellent.

Which explains how to balance the equation ZnSO4 + Li2CO -> ZnCO3 + Li2SO4 ?

A. One reactant and one product needs the coefficient 2.
B. The products both need a 3 coefficient.
C. The reactants both need a 2 coefficient.
D. Atoms in the equation are already balanced. ​

Answers

Explanation:

Atoms in the equation are already in balance.

Answer:

it is d, got it right on EDG

Explanation:

A substance X reacts with ammonium nitrate to produce a gas that turns damp red litmus paper blue. X must therefore be:
a) A salt
b) A catalyst
c) An alkali
d) An acid

Answers

Answer:

option C is correct

Explanation:

litmus paper turns red in acidic solution and turns blue in alkaline solution and turns purple in neutral solution

Balancing Chemical Equations method3- the algebraic method

Answers

Answer:

Write a different letter coefficient in front of each compound in the equation. Write algebraic expressions or rules for each element that equate its atoms on the LHS and RHS. Substitute the values into the other rules to obtain the balancing coefficients

Explanation:


Water vapor particles are most likely to phase change into liquid particles If the vapor particles come into contact with:
a cold surface
Ono surface
a warm surface
O any surface at all - the temperature of the surface does not matter

Answers

Answer:

A cold surface I think.

Explanation:

2. The energy of motion is called
energy.
A. potential
B. electrical
C. chemical
D. kinetic

Answers

Answer:

Kinetic energy

Explanation:

method used to separate ethanol from propanol​

Answers

Fractional distillation is a method for separating a liquid from a mixture of two or more liquids. For example, liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation. This method works because the liquids in the mixture have different boiling points.

Which chemical equation below is balanced to follow the Law of Conservation of Mass?
H2 + Cl2 + HCl
o 2 H2 + Cl2 + 3 HCI
2 H2 + 2Cl2 → 2 HCI
H2 + Cl2 → 2 HCI

Answers

Answer:

Balanced Equation

H₂ + Cl₂ → 2HCI

Answer:

Balanced Equation

H₂ + Cl₂ → 2HCI

Explanation:

i did it and 100%

state the iupac name for CH₃(CH2)₃C(CH₃)₃ ​

Answers

Answer:

CH3CH2COCl consists of three carbon atoms in the parent chain and chloroformyl group(-COCl). Therefore the name of the compound is Propanoyl chloride.

Someone help me please i’ll give brainly

Answers

Answer:

Ionization

Melting

Vaporization

Explanation:

▶Ioniztion changes the charge of an electron,  this usually happens between a chemical reaction. It takes a small amount of energy. Most of the time energy is absorbed instead of expelled!

▶ Melting changes the shape of the item and takes about 334 Joules/gram of energy.

▶ Vaporization changes the state of matter that the item is in and  requires 2260 Joules/gram.

Brainliest is much appreciated! Hope I helped!

Help plz!!!!!!!!!! Urgent

Answers

Answer:

Explanation:

10^-2

What happens when A mixture of ammonia and oxygen is passed over platinum gauze heated to 800°C .​

Answers

Answer:

The mixture forms nitrogen oxide and water upon reaction. However, 800 degree Celsius falls at higher limit of the process condition. It being an exothermic reaction, the reaction rate will be on the lower side than average.

do you think the mass of the products after the chemical reaction would be greater than, less than, or the same as the mass of the reactants before the chemical reaction?

Answers

It will be the same, as explained by conservation of mass.

hope this helped!

What is happening in this picture?

Answers

Answer:

in first picture pressure is low and in second picture the pressure is high

2ans in first picture air is

less amount

in second picture air is high amount

what are cons of viruses ?????? oh dont mind this i jus gotta get this out of my head dont stop pop tht pop tht mhm jus like tht mhm shake it shake it mhm work it work it!!!!!!!!!!!

Answers

Answer:

Viruses can weaken your immune system. They make you sick. Some could even cause death.

Explanation:

I hope this helped I heard that song I forgot the name lol

What is the formula for the compound formed when aluminum ions (Al3+) and chlorine ions (Cl-) unite?

A)AlCl
B)Al2Cl
C)AlCl2
D)AlCl3

Answers

The answer is D! Because when you combine the two, you cross the charges kinda like cross multiply. Basically you switch the charge and get Al- and Cl3+ making it AlCl3 !

What types of elements- metals,
nonmetals, or metalloids require
the most energy to remove an
electron?
Why do these elements have a higher ionization energy?

Answers

Answer:

Noble gases

Explanation:

The noble gases are non-metals that requires the highest amount of energy to remove an electron from their shells.

The reason for this difficult is that their electronic configuration confers a stable configuration them.

The ionization energy is the energy required to remove the most loosely held electrons in an atom. Due to the special stability of noble gases, it is very difficult to remove electrons from an atom of noble gases.

Atoms of two different elements must have different

Answers

Atomic number The atomic number of each element is different than other Elements.

Answer:

Atoms of two different elements must have different atomic numbers.

Explanation:

1. Glucose, a type of sugar, has the formula
CH, O. What is the total number of atoms
in one molecule of glucose?

Answers

Answer:

The answer is 24 in total

Explanation:

This is a 2:1 ratio. The formula of it is C6 H12 O6

Is PH3 polar or nonpolar

Answers

Phosphine is an example of a polar molecule with non-polar bonds

PLEASE HELP ASAP I EILL GIVE 100 POINTS!!! Kristy is on the track team. She runs the one kilometer race by going four times around the circular track. How does Kristy velocity change.
A. Her velocity changes countinually since her direction constantly changes
B. Her velocity depends on only on how she paces herself during the race
C. Her velocity is the same as her speed
D. Her speed changes at the same rate as velocity

Answers

Answer:A

Explanation:

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