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Unit 4 Chemistry Matter

Total questions: 58

Worksheet time: 39mins

Name
Class
Date
1.
What is the basic unit of matter and is the smallest particle of an element?
a)
Atoms
b)
Elements
c)
Compounds
d)
Molecules
2.
Two or more atoms chemically bonded together are called a
a)
atom
b)
element
c)
molecule
d)
mixture
3.
How many carbon atoms are there in a methane molecule? 
a)
0
b)
1
c)
4
d)
5
4.

How many hydrogen atoms are there in a water molecule? H20

a)

0

b)

1

c)

2

d)

3

5.

This is anything that has mass and takes up space (meaning it has a volume).

a)

matter

b)

mass

c)

element

d)

energy

6.
Elements are made of 
a)
many types of atoms 
b)
the periodic table
c)
one type of atom 
d)
molecules 
7.
All matter is made of 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
8.

Is NO2 an element or a molecule?

a)

element

b)

molecule

9.
How many atoms/elements are in CaCO3?
a)
3
b)
4
c)
5
d)
6
10.
How many atoms/elements are in NO2?
a)
1
b)
2
c)
3
d)
4
11.

Is K an element or a molecule?

a)

element

b)

molecule

12.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
13.
Substance made of two or more different elements that chemically combine. 
a)
Atom
b)
Element
c)
Compound
d)
Proton
14.

Which of the following is an example model of CH4?

a)
b)
c)
d)

None of these options

15.

How many carbon atoms are there in C3H12O5?

a)

1

b)

3

c)

12

d)

5

16.

How many sodium atoms are there in NaCl2?

a)

1

b)

2

c)

3

d)

4

17.
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
18.
What is the mass number defined as?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
19.
What is the atomic number of this atom?
a)
1
b)
3
c)
4
d)
7
20.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

21.

The fluorine atom has an atomic number of

a)

19

b)

9

22.

What is the mass number and atomic number ?

a)

Mass number = 7, atomic number = 14

b)

Mass number = 14, atomic number = 7

23.
Which particle has a positive charge?
a)
electron
b)
orbital
c)
proton
d)
neutron
24.
Choose the particle that has no charge.
a)
nucleus
b)
neutron
c)
proton
d)
electron
25.
The mass of one proton is greater than the mass of one...
a)
neutron
b)
electron
26.

Which subatomic particle has a negative charge in the atom?

a)

proton

b)

neutron

c)

electron

d)

quark

27.
What is the atomic number of this nucleus?
a)
1
b)
3
c)
4
d)
7
28.
What is the atomic number of this atom?
a)
9
b)
10
c)
19
d)
27
29.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
30.
What is the atomic number of this atom?
a)
1
b)
2
c)
3
d)
4
31.

How many neutrons are there in one atom of magnesium?

a)

12

b)

6

c)

24

32.

What Is The Atomic Number of Oxygen?

(a)  

33.

What Is The Atomic Number of Iodine?

(a)  

34.

What Is The Atomic Number of Gold?

(a)  

35.

What Is The Atomic Number of Helium?

(a)  

36.

What Is The Atomic Number of Hydrogen

(a)  

37.

What Is The Atomic Number of Iron

(a)  

38.

What Is The Atomic Number of Bromine

(a)  

39.

What Is The Atomic Number of Rubidium

(a)  

40.

What Is The Atomic Number of Molybdenum

(a)  

41.

What is atomic number?

a)

Number of protons and electrons

b)

Number of protons

c)

Number of neutrons

d)

Number of electrons

42.

What does the number Z represent?

a)

Mass number

b)

Atomic number

43.

(2002) Which of these symbols changes between isotopes of the same element?

a)

X

b)

A

c)

Z

d)

both A and Z

44.

Scientist who establishes that the atom has seven energy levels, each level has a certain amount of electrons, and that when the electron moves to another level, energy is released in packets. The quantum era begins.

a)

N Bohr

b)

JJ Thompson

c)

E Rutheford

d)

J Dalton

45.

Scientist who proposes that the atom has a nucleus

a)

JJ Thomson

b)

E. Rutherford

c)

Sommerfeld

d)

Heisenberg

46.

He suggested that the universe was made of Air

a)

Anaximenes

b)

Tales

c)

Democrito

d)

Heraclito

47.

This atomic model corresponds to

a)

Thomson

b)

Rutherford

c)

Schrodinger

d)

Bohr

48.

The atomic model that can be compared with a muffin or puddin

a)

Bohr

b)

Thomson

c)

Democrito

d)

Rutherford

49.

This scientist proposed that all atoms of the same type are all equal alongside chemical and physical properties.

a)

Dalton

b)

Thomson

c)

Tales

d)

Leucipo

50.

Mass number is represented by

a)

A

b)

Z

c)

p+

d)

n

51.

Scientist who modifies the Bohr model, explaining that the level of energy has sublevels where the electrons are distributed.

a)

Thomson

b)

Dalton

c)

Schrodinger

d)

Sommerfeld

52.

in a neutral atom

a)

p+ = n

b)

p+ = e-

c)

There are more neutrons to balance the charge

d)

There aren't electrons

53.

The atomic number is represented by the letter

a)

A

b)

P

c)

J de John

d)

Z

54.

Atomic number, Z = _____.

a)

the number of protons.

b)

the number of neutrons.

c)

the number of electrons, always.

d)

the mass of the atom in amu.

55.

Protons, p+, = the _____, in a neutral atom.

a)

mass number

b)

number of neutrons

c)

molar mass

d)

number of electrons

56.

Protons (p+) + ________ = mass number (A).

a)

electrons

b)

molar mass

c)

neutrons

d)

quarks

57.

___________ - atomic number (Z) = number of neutrons (n0).

a)

Average atomic mass

b)

Mass number

c)

Electrons

d)

Molar mass

58.

Relative atomic mass (Ar) rounded off = ____ of the most common isotope.

a)

atomic number

b)

mass number

c)

electons

d)

neutrons

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