Atomic and Nuclear Physics

Atomic and Nuclear Physics
The age of fossil when C-14: C-12 in bone is one fourth of ratio in bone of living animal and half-life of C-14 is 5732 years is
100 years
11460 years
1000 years
1200 years
Author: rikazzz Comment
Atomic and Nuclear Physics
The rate of radioactive decay is proportional to
nature of rays
no. of electron
no. of protons
no. of unstable nuclei
Author: rikazzz Comment
Atomic and Nuclear Physics
What fraction of the original sample will be after 22 years, if the Cobalt-50 is a radioactive element with a half-life of 4.3 years?
1⁄32
1⁄16
1⁄8
1⁄4
Author: rikazzz Comment
Atomic and Nuclear Physics
If the activity of a sample of radioactive bismuth decreases to 1/8 of its original activity in 15 days, then the sample’s half-life will be
3 days
10 days
5 days
7 days
Author: rikazzz Comment
Atomic and Nuclear Physics
The cosmic radiation consists of
protons and electrons
alpha particles
larger nuclei
all of above
Author: rikazzz Comment
Atomic and Nuclear Physics
The spontaneous emission of radiation by unstable nuclei is called
positive radioactivity
artificial radioactivity
natural radioactivity
negative radioactivity
Author: rikazzz Comment
Atomic and Nuclear Physics
The radiations emitted by different elements are
alpha
beta
gamma
all of above
Author: rikazzz Comment
Atomic and Nuclear Physics
The word atom is derived from the Greek word
antimum
atomis
otomos
optium
Author: rikazzz Comment
Atomic and Nuclear Physics
A process in which heavy nucleus splits into two by bombarding a slow-moving neutron is called
radioactivity
nuclear fusion
nuclear fission
nuclear splitting
Author: rikazzz Comment
Atomic and Nuclear Physics
The spontaneous process in which a parent unstable nuclide changes into a more stable daughter nuclide with the emission of radiations is called
nuclear radioactivity
nuclear transmutations
nuclear radioisotopes
nuclear ionization
Author: rikazzz Comment

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