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Radioactivity(General Knowledge > General Science ) Questions and Answers
Home
Topic
General Knowledge
General Science
Radioactivity
Question 1.
Two isotopes of the same element have
the same number of protons but different numbers of neutrons
the same number of protons but different numbers of electrons
the same number of neutrons but different numbers of protons
the same number of electrons but different numbers of protons
Explanation:-
Answer: Option A. ->
the same number of protons but different numbers of neutrons
Question 2.
The half-life of a radioisotope is 2400 years
300 years
2400 years
7200 years
19 200 years
Explanation:-
Answer: Option C. ->
7200 years
Question 3.
The isotopes of neutral atoms of an element differ in
Atomic number
Mass number
Number of electrons
Chemical properties
Explanation:-
Answer: Option B. ->
Mass number
Question 4.
Which particles make up the nucleus of an atom?
protons and neutrons
electrons and protons
electrons, protons, and neutrons
electrons and neutrons
Explanation:-
Answer: Option A. ->
protons and neutrons
Question 5.
A detector is used to measure the count-rate near a radioactive source
3 minutes
5 minutes
6 minutes
10 minutes
Explanation:-
Answer: Option D. ->
10 minutes
Question 6.
Which particles are negatively charged
alpha
beta
gamma
none of the above
Explanation:-
Answer: Option B. ->
beta
Question 7.
Fusion occurs when nuclei
split
combine
mutate
gain energy
Explanation:-
Answer: Option A. ->
split
Question 8.
Which is an alpha particle
Fast moving electron
4 2 He nuclei
fast moving positron
EM wave
Explanation:-
Answer: Option B. ->
4 2 He nuclei
Question 9.
The centre of an atom is called
the electron
the proton
the nucleus
the neutron
Explanation:-
Answer: Option C. ->
the nucleus
Question 10.
Which particles are found in the nucleus of an atom?
neutrons and protons only
neutrons only
protons and electrons only
protons, electrons and neutrons
Explanation:-
Answer: Option A. ->
neutrons and protons only
1
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