Category 1 Review - Chemistry

Question 1

Which subatomic particle determines an atom's identity?

Accepted Answer

Protons

Question 2

What is the only nonmetal on the left hand side of periodic table?

Accepted Answer

Hydrogen

Question 3

These groups are very reactive because...

Accepted Answer

They only need to gain/lose one or two electrons to have a full outer shell

Question 4

How many nitrogen atoms are shown below?

Accepted Answer

2

Question 5

Solubility is a chemical property.

Accepted Answer

False

Question 6

2H2 and O2 are produced from 2H2O when a water molecule is split. Which equation matches below?

Accepted Answer

2H2O → 2H2 + O2

Question 7

How many electrons can fit on the second energy level?

Accepted Answer

8

Question 8

How many electrons can fit on the first energy level?

Accepted Answer

2

Question 9

The coefficient is...

Accepted Answer

3

Question 10

"Matter cannot be created or destroyed". Which law does this describe?

Accepted Answer

Law of Conservation of Mass

Question 11

Mystery element X is shiny, brittle, and a semiconductor. Mystery element X is likely a...

Accepted Answer

Metalloid

Question 12

Which of the following is NOT an indicator of a chemical change?

Accepted Answer

Phase change

Question 13

This number tells you how many atoms you have of a certain element:

Accepted Answer

Subscript

Question 14

This subatomic particle determines the chemical and physical properties of an atom

Accepted Answer

Valence electrons

Question 15

What is the number of valence electrons needed for an atom to be stable? (with the exception of hydrogen and helium)

Accepted Answer

8

Question 16

These elements share the same...

Accepted Answer

Group

Question 17

How many hydrogen atoms are on the reactants side?

Accepted Answer

12

Question 18

How many electrons can fit on the third energy level?

Accepted Answer

18

Question 19

The only subscript shown is a...

Accepted Answer

2

Question 20

How many atoms are shown below?

Accepted Answer

6

Question 21

Which answer correctly includes each subatomic particle's charge?

Accepted Answer

Protons (+), Neutrons (0), Electrons (-)

Question 22

How many nitrogen atoms are shown below?

Accepted Answer

6

Question 23

How many valence electrons are in an atom of Fluorine?

Accepted Answer

7

Question 24

This number tells you how many molecules or compounds you have:

Accepted Answer

Coefficient

Question 25

The following chemical equation is balanced.

Accepted Answer

False

Category 1 Review - Chemistry

Questions 25

Category 1 Review - Chemistry

Questions 25