Quiz about Counting atoms and Chemical Reactions

Question 1

What is the left part of a chemical equation called?

2H₂ + O₂ ----> 2 H₂O

Accepted Answer

Reactants

Answer

Products

Answer

Yields

Answer

Chemical Equation

Question 2

What is the rightpart of a chemical equation called?

2H₂ + O₂ ----> 2 H₂O

Accepted Answer

Products

Answer

Reactants

Answer

Yield

Answer

Chemical reaction

Question 3

What is the total number of atoms in $$5Na_3PO_4$$

Accepted Answer

55

Answer

5

Answer

40

Answer

8

Question 4

How many Mn are found in the following compound $$2\ MnO_4$$ ?

Accepted Answer

2

Answer

1

Answer

4

Answer

8

Question 5

What is the little number after an element in a chemical equation called $$H_2$$ ?

Accepted Answer

Subscript

Answer

Coefficient

Answer

Atom

Answer

Equation

Question 6

Is the following equation balanced $$Al\ +\ O_2\ \rightarrow\ 2Al_2O_3$$ ?

Accepted Answer

NO

Answer

YES

Question 7

What is the number before the chemical equation called $$3H_2$$ ?

Accepted Answer

Coefficient

Answer

Subscript

Answer

Atom

Answer

Equation

Question 8

Which of the following equations is correctly balanced?

Accepted Answer

$$6CO_2+6H_2O\ ->C_6H_{12}O_6+6O_2$$

Answer

$$12CO_2+H_2O--->C_6H_{12}O_6+O_2$$

Answer

$$CO_2+9H_2O->C_6H_{12}O_6+O_2$$

Answer

$$CO_2+H_2O\ ->3C_6H_{12}O_6+O_2$$

Question 9

.

Balance this equation: $$H_2+Cl_2\ ->HCl$$

Accepted Answer

$$H_2+Cl_2\ ->2HCl$$

Answer

It is balanced.

Answer

$$3H_2\ +\ Cl_2->6HCl$$

Answer

H₂ + 3Cl₂ ---> 6HCl

Question 10

Balance this equation: HgO ---> 2Hg + O₂

Accepted Answer

2HgO ---> 2Hg + O₂

Answer

It is balanced.

Answer

2HgO ---> Hg + O₂

Answer

HgO ---> Hg + 2O₂

Question 11

What is a coefficient?

Accepted Answer

The large number in front of a chemical formula.

Answer

The small number on the right of the chemical symbol.

Answer

The number in between the chemical symbols.

Answer

The number behind a chemical formula.

Question 12

What is the Law of Conservation of Mass?

Accepted Answer

It states that matter cannot be created or destroyed.

Answer

It states that energy cannot be created or destroyed.

Answer

It states that matter can be created or destroyed.

Answer

It states that sound can be created or destroyed.

Question 13

How many HCl molecules do you need to balance this equation?

Mg + __HCl ---> MgCl₂ + H₂

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 14

What are the numbers that you CANNOT change in a chemical equation?

Accepted Answer

Subscripts

Answer

Coefficient

Answer

Reactants

Answer

Products

Question 15

The positively charged particle in an atom.

Accepted Answer

Proton

Answer

Neutron

Answer

Electron

Answer

Nucleus

Question 16

Identifies the number of protons in an atoms nucleus.

Accepted Answer

Atomic Number

Answer

Electron Cloud

Answer

Atomic Theory

Answer

Mass Number

Question 17

The negatively charged particles in an atom

Accepted Answer

Electron

Answer

Proton

Answer

Neutron

Answer

Electron Cloud

Question 18

The region inside an atom where electrons are likely to be found

Accepted Answer

Electron Cloud

Answer

Proton

Answer

Atom

Answer

Neutron

Question 19

The total number of protons and neutrons in the nucleus of an atom

Accepted Answer

Mass Number

Answer

Atomic Number

Answer

Atomic Theory

Answer

Electron Cloud

Question 20

The particles in the nucleus of an atom that do not have a charge (neutral)

Accepted Answer

Neutron

Answer

Proton

Answer

Electron

Answer

Ion

Question 21

The small, dense, positively charged center of an atom

Accepted Answer

Nucleus

Answer

Neutron

Answer

Proton

Answer

Electron

Question 22

The horizontal row on the periodic table is called a

Accepted Answer

period

Answer

group

Answer

family

Answer

atomic number

Question 23

A vertical column is called...

Accepted Answer

group

Answer

tower

Answer

period

Answer

crew

Question 24

Which of the following correctly lists the pair of subatomic particles that balance the charge of the atom?

Accepted Answer

Protons and electrons

Answer

Protons and neutrons

Answer

Electrons and neutrons

Answer

Electrons and ions

Question 25

Which is an electron?

Accepted Answer

A

Answer

B

Answer

C

Question 26

How many neutrons does nitrogen have?

Accepted Answer

7

Answer

14

Answer

0

Answer

6

Counting atoms and Chemical Reactions

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