Quiz about Counting Atoms and Chemical Reactions

Question 1

How many Magnesium are in 10MgCl₂?

Accepted Answer

10

Answer

5

Answer

20

Question 2

How many Sodium (Na) are in 6NaCl?

Accepted Answer

6

Answer

1

Answer

12

Question 3

How many elements are in C₆H₁₂O₆?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 4

How many atoms are there TOTAL in:
H₂SO₄

Accepted Answer

7

Answer

6

Answer

5

Answer

3

Question 5

(Element or Compound)
C₂H₈O

Accepted Answer

Compound

Answer

Element

Answer

Letters

Answer

Numbers

Question 6

A subscript is the small number below a(n) ________ that tells the number of _______ of that element.

Accepted Answer

element symbol; atoms

Answer

atom; element symbol

Answer

subscript; protons

Answer

compound; elements

Question 7

Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)

Accepted Answer

H3SO4

Answer

HSO4

Answer

H4S3O

Answer

H2O

Question 8

The red numbers in the image below represent ________

Accepted Answer

coefficients

Answer

subscripts

Answer

I don't know, and don't want to try

Answer

None of the answers are correct

Question 9

How many total atoms are in this compound?
H₂C₃O₄N₅

Accepted Answer

14

Answer

5

Answer

15

Answer

19

Question 10

If there is no subscript, there is/are ______ atom(s) of that element.

Accepted Answer

only 1

Answer

0

Answer

2

Answer

1 million

Question 11

Which is the correct formula for:
one carbon (C)
two oxygen (O)

Accepted Answer

CO2

Answer

CO

Answer

C2O

Answer

2CO

Question 12

The blue numbers in the image below represent ________

Accepted Answer

subscripts

Answer

I don't know, and don't want to try

Answer

coefficients

Answer

none of the answers are correct

Question 13

Black = Carbon (C)
White = Hydrogen (H)
What would be the formula for ethane?

Accepted Answer

C2H6

Answer

CH4

Answer

CH6

Answer

C2H2

Question 14

Which of the following is a compound?

Accepted Answer

CO2

Answer

Co

Answer

O2

Answer

C

Question 15

More than two atoms stuck together is called a ...................

Accepted Answer

molecule

Answer

element

Answer

Chemical property

Answer

Physical property

Question 16

The smallest building block of matter is the......................

Accepted Answer

atom

Answer

compound

Answer

molecule

Answer

fluid

Question 17

There are over 100 different kinds of atoms these different atoms are known as ....................

Accepted Answer

elements

Answer

mixtures

Answer

chemical bond

Answer

chemistry

Question 18

When a molecule is made up of more than two different elements ( Example CO₂) we call this .......................

Accepted Answer

a compound

Answer

a mixture

Answer

atom

Question 19

A series of numbers and letters that are used to represent a molecule

Accepted Answer

chemical formula

Answer

physcial property

Answer

chemical property

Answer

atom

Question 20

Which of the models best represents CaCO₃?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 21

How many atoms of Hydrogen are in this compound

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 22

What is the picture displayed?

Accepted Answer

element

Answer

atom

Answer

molecule

Answer

compound

Question 23

Is salt (NaCI) a compound or a element

Accepted Answer

Compound

Answer

element

Question 24

Which of the following is a compound?

Accepted Answer

MgBr

Answer

Ca

Answer

Pb

Answer

H2

Question 25

How many Oxygen are in H₂O?

Accepted Answer

1

Answer

2

Answer

0

Answer

4

Question 26

What carries no charge

Accepted Answer

Neutrons

Answer

Electrons

Answer

Protons

Question 27

Beryllium is in group number______.

Accepted Answer

Group 2

Answer

Group 3

Answer

Group 4

Answer

Group 7

Question 28

How many elements are in C₆H₁₂O₆?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 29

How many total atoms are in the compound C₂H₈O ?

Accepted Answer

11

Answer

2

Answer

8

Answer

1

Question 30

A pure substance that cannot be broken down into simpler substances?

Accepted Answer

Element

Answer

Molecule

Answer

Compound

Answer

All of these are correct

Question 31

A group of 2 or more different elements?

Accepted Answer

Compound

Accepted Answer

Chemical Formula

Answer

Element

Answer

Molecule

Question 32

2 atoms of the same element bonded together?

Accepted Answer

Molecule

Answer

Element

Answer

Compound

Question 33

Which of the following is a compound?

Accepted Answer

MgBr

Answer

Ca

Answer

Pb

Answer

H2

Question 34

How many elements are in the chemical formula below?

N₂C₂H₂O₂P₂S₂

Accepted Answer

6

Answer

12

Answer

64

Answer

2

Question 35

N₂C₂H₂O₂P₂S₂

_{How many total atoms are listed above?}

Accepted Answer

12

Answer

6

Answer

64

Answer

10

Question 36

What is a Coefficient?

Accepted Answer

Big # to the left of the chemical formula

Accepted Answer

A number that multiplies every atom involved

Answer

Big # to the right of the chemical formula

Answer

The small number to the right of the element

Question 37

What is a subscript?

Accepted Answer

A number that multiplies the specific element to the left

Accepted Answer

Small # to the right of the element

Answer

Big # to the left of the chemical formula

Answer

Small # to the left of the element

Question 38

TEK 8.5D - For Chemical Formulas, you must be able to. . .

Accepted Answer

All of these are correct

Answer

Identify Element by its symbol

Answer

Calculate # of Atoms

Answer

Differentiate between atoms, elements, molecules and compounds (Chemical Formulas)

Question 39

Which is NOT an example of chemical change?

Accepted Answer

change in size.

Answer

production of gas.

Answer

change in color.

Answer

transfer of energy.

Question 40

Which of the following could indicate a chemical change?

Accepted Answer

All of the answers could indicate Chemical Change

Answer

a color change has occurred

Answer

bubbles appear

Answer

identifying one or more new chemical products

Question 41

A copper penny turning greenish after a few years is an example of...

Accepted Answer

Chemical Change

Answer

Physical Change

Question 42

Which of the following is a PHYSICAL change?

Accepted Answer

Getting a haircut

Answer

Rusty metal

Answer

sour milk

Answer

A compound

Question 43

Which of the following IS a chemical change

Accepted Answer

digestion

Answer

using chalk

Answer

water freezing

Answer

slicing cheese

Question 44

What is the law of conservation of mass?

Accepted Answer

Within a closed system, mass does not change

Answer

The part of the universe being studied

Answer

The rest of the universe that interacts with the system

Answer

A system that freely exchanges matter and energy

Question 45

Which is NOT an example of chemical change?

Accepted Answer

change in size.

Answer

production of gas.

Answer

change in color.

Answer

transfer of energy.

Question 46

Chemical reactions that absorb energy are known as ________________________.

Accepted Answer

Endothermic

Answer

Exothermic

Answer

Boring

Answer

Reactions

Question 47

The mass after a physical change, such as ice melting into water, stays the same

Accepted Answer

True

Answer

False

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