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(S347) Chemistry of Life (2.1-2.8)

Total questions: 40

Worksheet time: 30mins

Name
Class
Date
1.

The number 16 for the atomic element sulfur is the

a)

ionic number

b)

isotope

c)

atomic mass

d)

atomic number

2.

How many protons does sulfur have?

a)

32

b)

16

c)

48

d)

12

3.

How many electrons does sulfur have

a)

16

b)

32

c)

48

d)

12

4.
How many electrons does potassium K contain? (click to see image)
a)
19
b)
39
c)
20
d)
40
5.
How many protons are in Beryllium?
a)
4
b)
9
c)
5
d)
2
6.

What is the atomic number of this atom?

a)

1

b)

3

c)

4

d)

7

7.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

8.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
9.
In order for an atom to be neutral what has to be true?
a)
The atom has more protons than neutrons
b)
The atom has more neutrons than protons
c)
The atom has the same number of protons and neutrons
d)
The atom has the same number of protons and electrons
10.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

a)

20

b)

10

c)

35

d)

25

11.
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
12.

Which of the following determines the identity of an element?

a)

number of protons

b)

atomic mass

c)

number of neutrons

d)

number of shells

13.
Which of the following has a full valence shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon
14.
What happens when the sodium atom loses an electron?
a)
It become negatively charged 
b)
It become positively charged
c)
none
15.
What is a valence electron?
a)
an electron that is found in the outermost shell of an atom. 
b)
an electron found in the innermost shell of an atom.
c)
an electron found in the middle shell.
16.
According to the diagram below, how many bonds will this atom need to make to be stable?
a)
1
b)
2
c)
3
d)
4
17.
How many Valence Electrons are on Oxygen
a)
2
b)
7
c)
6
d)
1
18.
Which of these would be covalently bonded
a)
Fr and K
b)
Sc and O 
c)
F and Cl
d)
He and Pt
19.
Why do bonds form?
a)
To fill the valence shell of electrons for the elements involved
b)
to release energy stored in the bonds
c)
because whenever you mix two chemicals, there will be a reaction
d)
because of attraction
20.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
21.
How are covalent bonds explained?
a)
When one atom takes the other atom's electron
b)
When the atom shares an electron with an another atom
c)
When the two nucleus merge
d)
When the neutrons leave the nucleus
22.
In chemical compounds, covalent bonds form when
a)
the electronegativity difference between two atoms is very large.
b)
electrons are completely transferred between two metals.
c)
pairs of electrons are shared between two nonmetal atoms.
d)
two nonmetal atoms are attracted to each other by opposite charges.
23.
What region of the periodic table contains atoms that form covalent bonds?
a)
the left side
b)
the middle
c)
the right side
d)
top left
24.
Is carbon considered a metal or a non-metal?
a)
metal
b)
nonmetal
c)
other
25.
How are ionic bonds formed?
a)
When atoms share an electron
b)
When opposite charged atoms attract
c)
When one atom takes a proton
d)
When one atom takes a neutron
26.
Are the atoms more stable when they are bonded together or when they are apart? 
a)
Bonded Together
b)
Apart
27.

When an atom loses an electron, it becomes a:

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

28.

When an atom gains an electron, it becomes a:

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

29.

Ionic bonds form between a

a)

two metals

b)

nonmetal and nonmetal

c)

metal and nonmetal

d)

two metalloids

30.

Covalent bonds form between a

a)

nonmetal and nonmetal

b)

metal and nonmetal

c)

two metals

d)

two metalloids

31.

According the "Octet rule", how many valence electrons does an atom need to have a stable electron configuration?

a)

1

b)

5

c)

8

d)

10

32.

H and He are exceptions to the Octet Rule. How many electrons can they have in their outer shell?

a)

1

b)

2

c)

8

d)

10

33.

How does Lithium become an ion?

a)

Lose 1 electron

b)

Gain 7 electrons

c)

Lose 3 electrons

d)

Gain 1 electron

34.

How does Fluorine become an ion?

a)

Gain 1 electron

b)

Lose 1 electron

c)

Lose 7 electrons

d)

Lose 2 electrons

35.

How many covalent bonds does each carbon have in the molecule shown?

a)

4

b)

2

c)

8

d)

6

36.

How many covalent bonds can a hydrogen atom typically form?

a)

1

b)

2

c)

4

d)

3

37.

Which of the following elements can form up to two covalent bonds?

a)

Oxygen

b)

Nitrogen

c)

Sulfur

d)

Hydrogen

38.

What is the maximum number of covalent bonds a nitrogen atom can form in a stable molecule?

a)

4

b)

3

c)

2

d)

1

39.

Given the line drawing of a glucose molecule, how many carbon atoms are present?

a)

6

b)

5

c)

12

d)

4

40.

How many hydrogen atoms are found in a glucose molecule as shown in its line drawing?

a)

24

b)

6

c)

12

d)

18

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