Atomic and Nuclear Physics

Atomic and Nuclear Physics
The elements which emit natural radioactivity are known as
radio elements
active elements
radioactive elements
nuclear elements
Author: rikazzz Comment
Atomic and Nuclear Physics
In SI base units, 1 Bq is equal to
10 disintegration per second
1.5 disintegration per second
0.01 disintegration per second
1 disintegration per second
Author: rikazzz Comment
Atomic and Nuclear Physics
Radiations present in atmosphere due to different radioactive substances are called
environmental radiations
background radiations
positive radiations
cosmic radiations
Author: rikazzz Comment
Atomic and Nuclear Physics
The process in which two light nuclei combine to form a heavy nucleus is called
fusion reaction
fission reaction
radioactivity
transmutation
Author: rikazzz Comment
Atomic and Nuclear Physics
The types of radiations emitted by the radioactive substance are
2
4
5
3
Author: rikazzz Comment
Atomic and Nuclear Physics
In beta decay the nucleon number
decreases by 1
increases by 1
increases by 2
remains unchanged
Author: rikazzz Comment
Atomic and Nuclear Physics
If a C-14 has a half-life of 5730 years, then how long will it take for the number of C-14 in a sample to drop to 1/8 of initial quantity?
2.58 × 10⁴ years
1.44 × 10⁴ years
1.72 × 10⁴ years
2.58 × 10⁴ years
Author: rikazzz Comment
Atomic and Nuclear Physics
Cosmic radiations interact with atoms atmosphere to create
primary radiation
secondary radiation
tertiary radiation
no radiation at all
Author: rikazzz Comment
Atomic and Nuclear Physics
The artificially produced radioactive elements are known as
ions
radiant
radioisotopes
transmutations
Author: rikazzz Comment
Atomic and Nuclear Physics
As compared to electron, a proton is about
1936 times lighter
1836 times lighter
1936 times heavier
1836 times heavier
Author: rikazzz Comment

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