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Basic Chemistry

Total questions: 64

Worksheet time: 46mins

Name
Class
Date
1.

A covalent bond forms

a)

when one or more electrons are transferred from one atom to another.

b)

when electrons are shared between atoms.

2.

Which two subatomic particles are found in the nucleus of an atom?

a)

Neutrons and Protons

b)

Shells and Electrons

c)

Electrons and Protons

d)

Electrons and Neutrons

3.

An atom becomes a positive ion when it

a)

gains electrons

b)

gains protons

c)

loses electrons

d)

loses electrons or gains protons

4.

Which subatomic part of an atom gives it a positive charge?

a)

Neutron

b)

Proton

c)

Electron

d)

Nucleus

5.

An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?

a)

0

b)

7

c)

6

d)

13

6.

How many protons are in carbon?

a)

12

b)

6

c)

0

d)

7

7.

The center of an atom where its neutrons and protons are is called the _____________.

a)

nucleus

b)

electron cloud

c)

center

8.
An atom is made up of protons, neutrons, and electrons.  Which is the smallest subatomic particle?
a)
Proton
b)
Neutron
c)
Electron
d)
Idontknowatron
9.
Which is an electron?
a)
A
b)
B
c)
C
10.

All matter is made of _________.

a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
11.

The amount of matter/atoms in an object is...

a)

volume

b)

mass

c)

density

d)

weight

12.

An electron has a _________ charge

a)

positive

b)

neutral

c)

negative

d)

massive

13.

A proton has a ___________ charge.

a)

positive

b)

negative

c)

neutral

d)

massive.

14.
The particles with no charge in an atom are the _______.
a)
electrons
b)
neutrons
c)
protons
d)
protons and neutrons
15.

How many protons does Potassium (K) have?

a)

19

b)

39

c)

20

d)

58

16.

How do you calculate the number of neutrons? *

a)

Mass = Atomic number - Neutrons

b)

Mass - Atomic number = Neutrons

c)

Atomic number = Neutrons

17.

How many valence electrons does the element have?

(valence electrons are the electrons in the outermost energy shell)

a)

1

b)

2

c)

3

d)

4

18.
How many neutrons are in an atom of zinc if its atomic number is 30 and its mass number is 65?
a)
25
b)
30
c)
35
d)
65
19.
26.982 is aluminum's _______________.
a)
atomic number
b)
average atomic mass
c)
number of neutrons
d)
number of protons
20.
How many neutrons are in an atom of nitrogen if its atomic number is 7 and its mass number is 15?
a)
7
b)
15
c)
8
d)
22
21.
The first energy level holds 2 electrons.  The second energy level holds 8 electrons.  The third energy level holds 18 electrons.
If an atom has 9 electrons, what energy level do you have to go up to fit all the electrons?
a)
1st
b)
2nd
c)
3rd
d)
4th
22.
What charge would this sodium atom/ion have?
a)
-1
b)
0
c)
+1
d)
+2
23.
Why do electrons stay near the nucleus?
a)
they are caught by its gravity
b)
they are attracted to the positive charge
c)
they are repelled by other electrons
d)
they have a subatomic affinity for perfectly circular orbits
24.
An element has an atomic number of 76.  The number of protons and electrons in a neutral atom of the element are
a)
152 p+, 76 e-
b)
76 p+, 0 e-
c)
38 p+, 38 e-
d)
76 p+, 76 e-
25.
Contributes basically no mass to an atom.
a)
protons
b)
neutrons
c)
electrons
d)
protons and neutrons
26.
An atom has 5 protons, 7 neutrons and 5 electrons. What is the mass number of the atom?
a)
10
b)
7
c)
2
d)
12
27.
In a neutral atom, what needs to be true?
a)
The number of protons and neutrons are the same
b)
The number of protons and electrons are the same
c)
The number of neutrons and electrons are the same
d)
None of the above
28.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
29.

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

a)

2

b)

4

c)

6

d)

8

e)

10

30.

One covalent bond is formed by ...

a)

the exchange of 1 electron

b)

the exchange of 2 electrons

c)

the sharing of 4 electrons

d)

the sharing of 2 electrons

31.

2CH42CH_4  represents

a)

2 molecules and 4 total atoms

b)

2 molecules and 10 total atoms

c)

1 molecule and 5 total atoms

d)

1 molecule with 10 total atoms

32.

4N24N_2   represents

a)

4 molecules and 8 total atoms

b)

1 molecule and 8 total atoms

c)

4 molecules and 2 total atoms

d)

1 molecule with 10 total atoms

33.

T/F: 2H2 = H42H_2\ =\ H_4  

a)

TRUE

b)

FALSE

34.

T/F: 3O2 = O63O_2\ =\ O_6  

a)

TRUE

b)

FALSE

35.

2 NH32\ NH_3  contains...

SELECT ALL THAT APPLY!

a)

2 molecules

b)

8 total atoms

c)

6 total atoms

d)

6 hydrogen atoms

e)

1 nitrogen atom

36.

The arrows in the image indicate...

a)

covalent bonds

b)

ionic bonds

c)

physical bonds

d)

James Bond

37.

A covalent bond is...

a)

a sharing of two electrons between atoms

b)

an attraction between two molecules

c)

a donation of an electron from one atom to another

d)

a sharing of two electrons between molecules

38.

Protons = 5

Neutrons = 6

Electrons = 4

Atomic mass = (a)  

39.

Protons = 3

Neutrons = 4

Electrons = 2

Atomic mass = (a)  

40.

Protons = 7

Neutrons = (a)  

Electrons = 9

Atomic mass = 15

41.

Protons = 3

Neutrons = 4

Electrons = 2

Charge = (a)  

42.

Protons = 43

Neutrons = 47

Electrons = 45

Charge = (a)  

43.

All iron atoms in the universe have the...

a)

same number of neutrons

b)

same number of electrons

c)

same number of protons

d)

same mass

44.

Two atoms with the same mass must contain...

a)

the same number of neutrons

b)

the same number of electrons

c)

the same number of protons

d)

None of the other are correct

45.

Atom A is heavier than Atom B. That means Atom A must...

a)

have more electrons than Atom B

b)

have more protons than Atom B

c)

None of the other answer choices are correct

d)

have more particles in its nucleus than Atom B

46.

If an atom has 38 protons, 38 electrons, and 40 neutrons. What is the mass number?

(a)  

47.

If an atom has 38 protons, 38 electrons, and 40 neutrons. What is the net charge?

(a)  

48.

If an atom has 5 protons, 8 electrons, and 6 neutrons. What is the mass number?

(a)  

49.

If an atom has 5 protons, 8 electrons, and 6 neutrons. What is the net charge?

(a)  

50.

What is this?

a)

Atom

b)

Molecule

c)

Compound

51.

How many molecules are in the image?

(a)  

52.

How many molecules are in the image?

(a)  

53.

How many molecules are in the image?

(a)  

54.

How many atoms are in the image?

(a)  

55.

How many atoms are in the image?

(a)  

56.

How many molecules are in the reactants?

(reactants = what goes in to a chemical formula)

(a)  

57.

How many molecules are in the products?

(products = what comes out of a chemical formula)

(a)  

58.

____ atoms are going in to this reaction and ____ atoms are coming out of this reaction.

a)

36 ; 36

b)

7 ; 12

c)

30 ; 30

d)

30 ; 16

59.

How many bonds would the atom shown want to make?

(i.e., how many more electrons does it need to fulfill the octet rule?)

a)

1

b)

3

c)

8

d)

2

60.

How many bonds would the atom shown want to make?

(i.e., how many more electrons does it need to fulfill the octet rule?)

a)

1

b)

3

c)

8

d)

2

61.

Click the atomic number of zinc.

A
B
C
62.

Aluminum generally has (a)   neutrons in its nucleus.

63.

Aluminum generally has (a)   protons in its nucleus.

64.

Iron's atomic number is ​ (a)   . The heaviest metal here is ​ (b)   . Iron generally has ​ (c)   neutrons in its nucleus.

Choose from the below words
26
cobalt
30
27
28
iron
nickel
56

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