WorksheetsNuclear Chemistry
Total questions: 25
Worksheet time: 14mins
An isotope is a version of an element with the same number of protons but different number of (a) .
Describe the structure of an alpha particle.
a fast-moving electron
2 protons and 2 neutrons
a slow-moving neutron
a hydrogen nucleus
What is the relative charge of an alpha particle?
-1
0
1
2
In alpha decay, the mass number...
increases by 2
decreases by 2
increases by 4
decreases by 4
In alpha decay, the atomic number...
increases by 2
decreases by 2
increases by 4
decreases by 4
The mass number of Neptunium (Np) is (a) .
The atomic number of Neptunium (Np) is (a) .
In beta-plus decay...
the mass number decreases by 1
the mass number does not change
the mass number increases by 1
the atomic number decreases by 1
the atomic number increases by 1
The atomic number of Actinium (Ac) is (a) .
The atomic number of Carbon (C) is (a) .
A high energy electron is a(n):
Alpha Particle
Beta Particle
Gamma Ray
A helium nucleus is a(n):
Alpha Particle
Beta Particle
Gamma Ray
Is the following alpha or beta decay?
243U → ____ + 239Th
Alpha
Beta
Gamma
Gramma
Is this alpha or beta decay?
60Co → _____ + 60Ni
Alpha
Beta
Gamma
Grandpa
Finish the following:
55Fe → β + _____
55Co
51Cr
55Cr
51Co
State the relative mass of a gamma ray.
(a)
In gamma decay, the nucleus...
loses a proton
loses 2 protons and 2 neutrons
loses energy, but doesn't change
does nothing
Cobalt-60 (shown in diagram) undergoes gamma decay. What will it's atomic number be after it decays?
(a)
Cobalt-60 (shown in diagram) undergoes gamma decay. What will it's mass number be after it decays?
(a)
The % of the parent isotope remaining after 1 Half Life.
50%
25%
12.5%
6.25%
The % of the parent isotope remaining after 2 Half Lives.
50%
25%
12.5%
6.25%
What is the Half life of this isotope?
5 seconds
10 seconds
15 seconds
20 seconds
What is the only difference between two different isotopes of the same element?
Number of neutrons
Number of protons
Number of electrons
Size of atom
