The half-life of a radioactive material is 3 h. If the initial amount is 300g, then after 18 h, it will remain.
4.68g
46.8 g
9.375 g
93. 75 g
Half - life period of a radioactive substance is 6h. After 24 h activity is 0.01 µC, what was the initial activity?
0.04 µC
0.08µC
0.24 µC
0. 16 µC
A free neutron decays into a proton, an electron and.
A beta particle
An alpha particle
an antineutrino
a neutrino
The ratio of the radii of the nuclei 13AI27 and 52Te125 is approximately.
6 : 10
13 : 52
40 : 177
14 : 73
Which of the following is positively charged?
α - particle
β- particle
y-rays
X-rays
The nucleus 6C12 absorbs an energetic neutron and emits a beta particle (β). The resulting nucleu is.
7N14
7N13
5B13
6C13
Let mp denotes the mass of a proton and mn that of a neutron. A give nucleus of binding energy BE, contains Z protons and N neutrons. The mass m (N,Z) of the nucleus is given by:
m(N,Z) = Nmn + Zmp - BEc2
m(N,Z) = Nmn + Zmp + BEc2
m(N,Z) = Nmn + Zmp - BE/c2
m(N,Z) = Nmn + Zmp + BE/c2
In nuclear fission process, energy is released because.
mass of products is more than mass of element
total binding energy of produces formed due to nuclear fission is more than the parent fissionable material.
total binding energy of products formed due to nuclear fission is less than parent fissionable material.
mass of some particles is converted into energy.
In a given reaction
zXA → z+1YA → z-1KA-4 → z -1KA-4
Radioactive radiaitons are emitted in te sequence of.
α β
β α
The mass number of a nucleus is :
Sometimes equal to its atomic number
Sometimes less than and sometimes more than its atomic number
Always more than its atomic number
