The wavelength of associated wave of a particle moving with a speed of one-tenth that of light is 7Å. The particle must be
electron
proton
nanoparticle
photon
, but the product is also radioactive and give 235U. Which particles(s) is/ are emitted by the product?
4 neutrons
4 protons
4 protons and 2electrons
2 neutrons and 2 protons
D.
2 neutrons and 2 protons
On emission of a β from the nucleus, the new element formed possesses the same atomic mass but nuclear charge or atomic number is increased by one unit over the parent element followmg reaction takes place.
Number of protons in U-235 = 92
Product has an atomic number two units less than and a mass number four units less than
Hence, Z emits an alpha (α) particle which contain 2 protons and 2 neutrons.
For a f-orbital, the values of m are
-1, 0, +1
0, +1, +2, +3
-2, -1, 0, +1, +2
-3, -2, -1, 0, +1, +2, +3
A radio isotope will not emit
gamma and alpha rays simultaneously
gamma rays only
alpha and beta rays simultaneously
beta and gamma rays simultaneously
A lone pair of electrons in an atom implies
a pair of valence electrons not involved in bonding
a pair of electrons involved in bonding
a pair of electrons
a pair of valence electrons
An artificial radioactive isotope gave N after two successive β-particle emissions. The number of neutrons in the parent nucleus must be
9
14
5
7
The number of α and β- particles emitted during the transformation of 90Th232 to 82Pb208 respectively are
4, 2
2, 2
8, 6
6, 4