Free Printable 8.5AB Atoms Review

1.

The mass number of Atom A is (a) because there are 6 positive (b) and 6 neutral (c) in the nucleus. Since the atomic number of Atom A is (d) then Atom A can be identified as (e) .

Choose from the below words

12

protons

neutrons

6

carbon

magnesium

electrons

18

2.

The mass number of Atom B is (a) because there are 7 positive (b) and 7 neutral (c) in the nucleus. Since the atomic number of Atom B is (d) then Atom B can be identified as (e) .

Choose from the below words

protons

neutrons

silicon

electrons

21

14

7

nitrogen

3.

Which part of an atom is most reliable in giving you the identity of the atom? (Choose the correct column)

A

B

C

D

4.

Which is more reactive, boron or lithium?

a)

Boron

b)

Lithium

5.

Which property makes lithium more reactive than boron?

a)

Lithium has a smaller atomic number

b)

Lithium only has 3 electrons

c)

Lithium only has 1 valence electron

d)

Lithium has a negative charge.

6.

Which is the least reactive element in the table?

a)

Lithium

b)

Boron

c)

Sodium

d)

Unknown Element

7.

What is the identity of the unknown element? You may need to refer to the periodic table.

a)

Titanium

b)

Argon

c)

Oxygen

d)

Zirconium

8.

Which elements have similar reactivities?

a)

Lithium

b)

Boron

c)

Sodium

d)

Argon (Unknown)

9.

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

a)

11

b)

5

c)

6

d)

16

10.

A phosphorus atom has 15 protons and 16 neutrons. What is the mass number?

a)

15

b)

16

c)

31

d)

1

11.

An atom of argon has 18 protons and 22 neutrons. How many electrons does it have?

a)

18

b)

22

c)

40

d)

4

12.

A fluorine atom has 9 protons and 10 neutrons. What is the atomic number of fluorine?

a)

9

b)

10

c)

19

d)

1

13.

What is the mass number of this nucleus?

a)

1

b)

3

c)

4

d)

7

14.

What is the atomic mass of this atom?

a)

1

b)

3

c)

4

d)

7

15.

Valence electrons are:

a)

Electrons on the outermost electron shell

b)

Electrons closest to the nucleus

c)

Electrons that are found at all electron shells

d)

Electrons in the second shell

16.

Valence Electrons determine an element's _____________.

a)

Reactivity

b)

Location

c)

Identity

d)

Color

17.

a)

2

b)

3

c)

5

18.

a)

2

b)

6

c)

10

d)

16

19.

a)

2

b)

5

c)

10

d)

15

20.

What is the atomic number of this nucleus?

a)

1

b)

3

c)

4

d)

7

21.

What is the atomic number of this atom?

a)

9

b)

10

c)

19

d)

27

22.

What is the atomic number of this atom?

a)

8

b)

16

c)

24

d)

none of the above

23.

Which letter represents a proton?

a)

A

b)

B

c)

C

d)

D

24.

Which letter represents a neutron?

a)

A

b)

B

c)

C

d)

D

25.

Which letter represents an electron?

a)

A

b)

B

c)

C

d)

D

26.

What is the mass number?

a)

the number of protons

b)

the number of protons and neutrons

c)

the number of neutrons

d)

the number of protons and electrons

27.

What is the atomic number?

a)

the number of protons

b)

the number of protons and neutrons

c)

the number of neutrons

d)

the number of protons and electrons

28.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

29.

Which element is this?

a)

Nickel

b)

Neon

c)

Sodium

d)

Nitrogen

30.

Name this element.

a)

Neon

b)

Magnesium

c)

Sodium

d)

Manganese

31.

Beryllium has how many protons?

a)

4

b)

9.0122

c)

2

d)

13.0122

32.

12. The table provides information on four different elements. Which element has six protons in its nucleus?

a)

A. Boron

b)

B. Carbon

c)

C. Nitrogen

d)

D. Oxygen

33.

An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom? (8.5A)

a)

84

b)

36

c)

48

d)

72

34.

Four students were asked to name the parts of an atom that determine the atom’s identity and chemical properties. The students’ responses are shown in the table below.

a)

Student 1

b)

Student 2

c)

Student 3

d)

Student 4

35.

Place the elements in the correct order by LEAST (left) number of Protons to MOST (right) number of protons.

a)

Hydrogen

b)

Carbon

c)

Aluminum

d)

Potassium

e)

Xenon

1)

2)

3)

4)

5)

36.

A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity?

a)

The 20 protons in each atom

b)

The density of calcium , which is 1.54 g/cm^3

c)

The atomic mass of calcium

d)

The 2 valence electrons in each calcium atom.

37.

A chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determines the elements identity.

a)

The number of protons

b)

The number of electrons

c)

The number of valence electrons

d)

The number of neutrons.

8.5AB Atoms Review

Total questions: 37

Worksheet time: 30mins

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