WorksheetsAtomic Structure
Total questions: 12
Worksheet time: 6mins
Name
Class
Date
1.
Protons have a positive electrical charge, electrons have a negative charge and neutrons have no charge.
a)
True
b)
False
2.
Atoms are the smallest units of matter.
a)
True
b)
False
3.
There are different types of atoms with different numbers of protons, electrons and neutrons. They are called _____________.
a)
Ions
b)
Isotopes
c)
Radioactive
d)
Stable
4.
The atomic mass of an atom is the total mass of all of its protons, electrons and Neutrons.
a)
True
b)
False
5.
Every element has an atomic number determined by the number of _______ found in the nucleus.
a)
Neutrons
b)
Electrons
c)
Protons
d)
energy levels
6.
________ has mass is located in the nucleus with a positive charge.
a)
Proton
b)
Neutron
c)
Electron
d)
Isotope
7.
________ has mass is located in the nucleus with no charge.
a)
Proton
b)
Neutron
c)
Electron
d)
Isotope
8.
________ has insignificant mass is located outside the nucleus with negative charge.
a)
Proton
b)
Neutron
c)
Electron
d)
Isotope
9.
________ has the same number of protons but different numbers of neutrons.
a)
Proton
b)
Neutron
c)
Electron
d)
Isotope
10.
An element with an atomic number of 19 has an atomic mass of 40; how many neutrons does it have?
a)
20
b)
19
c)
59
d)
21
11.
A 123 L sample of a gaseous substance at 30oC is reduced to 100 L volume; what is the new temperature?
a)
0.003 K
b)
40.6 K
c)
246.3 K
d)
24.4 K
12.
A 123 L sample of a gaseous substance at 40 Pa is reduced to 100 L volume; what is the new pressure?
a)
49.2 Pa
b)
32.5 Pa
c)
307.5 Pa
d)
0.003 Pa
100 %
