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Unit 2 Review

Total questions: 39

Worksheet time: 1hrs 11mins

Name
Class
Date
1.
If there is no subscript, there is ______ atom(s) of that element.
a)
0
b)
2
c)
only 1
d)
1 million
2.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
3.

How many atoms of Hydrogen are in this compound

a)

1

b)

2

c)

3

d)

4

4.
How many atoms of Oxygen are in this compound?
a)
1
b)
2
c)
3
d)
4
5.
How many atoms of Hydrogen are in this compound?
a)
1
b)
2
c)
3
d)
4
6.
How many atoms of Oxygen are in this compound?
a)
1
b)
2
c)
3
d)
4
7.
How many atoms are in the element Carbon in this compound?
H2C3O4N5
a)
2
b)
3
c)
4
d)
5
8.
How many TOTAL atoms are in this compound?
H2C3O4N5
a)
5
b)
14
c)
15
d)
19
9.
In this compound structure of alcohol, how many Hydrogen atoms are there?
a)
2
b)
4
c)
6
d)
8
10.
How many elements are present in this compound?
Mg2As3COHNi2
a)
2
b)
4
c)
6
d)
10
11.
Which of these is NOT a compound?
a)
H2Cr
b)
Cr3
c)
OH
d)
PNi
12.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
13.
an electron has this charge
a)
positive
b)
negative
c)
neutral
14.
a neutron has this charge
a)
negative
b)
positive
c)
neutral
15.
a capital letter or combination of a capital letter and a small letter that is used to represent an element is called a(n) ________
a)
chemical symbol
b)
element sign
16.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
17.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
18.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
19.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
20.

How many atoms are there TOTAL in H2SO4 ?

a)

6

b)

5

c)

7

d)

3

21.

How many Nitrogen atoms are in (NH₄)₂CrO₄?

a)

1

b)

2

c)

8

d)

16

22.

What is C2H8O ?

a)

Element

b)

Letters

c)

Numbers

d)

Compound

23.

How many Nitrogen atoms are in the in H2C3O4N5?

a)

2

b)

3

c)

4

d)

5

24.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
25.

How many elements are present in this compound? (Careful!)

Mg2As3COHNi2

a)

2

b)

4

c)

6

d)

10

26.

Are there any compounds on the periodic table?

a)

yes there are many

b)

no because only elements are on the periodic table

c)

I think they are?

d)

there is no way to tell

27.
How many atoms of Oxygen are in Fe(NO3)3 ?
a)
6
b)
3
c)
9
d)
1
28.

The table lists some compounds found in foods and their formulas.

Based on this information, which of these statements is NOT true?

a)

A molecule of sorbitol contains three more oxygen atoms then a molecule of glutamine does.

b)

A molecule of lactose contains twice as many atoms as a molecule of fructose does.

c)

A molecule of fructose contains four more atoms than a molecule of glutamine does.

d)

A molecule of lactose contains twice as many carbon atoms as a molecule of sorbitol does.

29.

A student is using colored breads to make a model of aluminum sulfate, Al2(SO4)3. Aluminum atoms are represented by blue beads, sulfur atoms by yellow beads, and oxygen atoms by green beads.

What combination of beads should the student use for the model?

a)

6 blue, 3 yellow, and 7 green

b)

2 blue, 1 yellow, and 4 green

c)

2 blue, 3 yellow, and 12 green

d)

6 blue, 12 yellow, and 12 green

30.

Strontium phosphate, Sr3(PO4)2, is a crystalline substance used in medicince and industry. How many phosphorus atoms are represented in the formula for Sr3(PO4)2?

a)

2

b)

3

c)

4

d)

8

31.

The table shows the chemical formulas for four substances.

Which substances have the same number of carbon atoms?

a)

Substances 1 and 2

b)

Substances 2, 3, and 4

c)

Substances 2 and 3 only

d)

Substances 1 and 3

32.

Which of these formulas contain equal numbers of nitrogen atoms?

a)

Formulas I and III

b)

Formulas I and IV

c)

Formulas II and III

d)

Formulas I, II, and V

33.

The equation represents a chemical reaction that occurs in living cells.

How many atoms are represented in the reactants of this equation?

a)

6

b)

12

c)

24

d)

36

34.

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

a)

H3PO4

b)

H2SO4

c)

HClO3

d)

H2O

35.

the chemicalformula for sodium sufate is Na2SO4. How many sulfur atoms are in the formula for sodium sulfate?

a)

1

b)

2

c)

6

d)

7

36.

Serotonin is a chemical substance that acts as a neurotransmitter. It helps relay messages in the human brain. The formula for one molecule of serotonin is shown.

C10H12N2O

How many atoms in all are in a molecule of serotonin?

a)

10

b)

25

c)

24

d)

12

37.

How many atoms of oxygen are in a molecule of glucose (C6H12O6)?

a)

24

b)

12

c)

6

d)

1

38.
compounds are chemically bounded together 
a)
False
b)
true
c)
I don't know?
39.
Which one has more than one type of atom in it
a)
Element
b)
Compound 

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