Which of the following is true? |
|
a) |
Diapositive zinc exhibits paramagnetism due to loss of two electrons from a orbital of neutral atom |
b) |
In -emission from a nucleus, the atomic number of the daughter element decreases by 1 |
c) |
The emission of one -particle from a radioactive atom results in the decrease of atomic number by 2 and mass number by 4 |
d) |
The successive emission of two -particles from a radioactive atom results in the decrease of atomic number by 1 |
Which of the following is true? |
|
a) |
Diapositive zinc exhibits paramagnetism due to loss of two electrons from a orbital of neutral atom |
b) |
In -emission from a nucleus, the atomic number of the daughter element decreases by 1 |
c) |
The emission of one -particle from a radioactive atom results in the decrease of atomic number by 2 and mass number by 4 |
d) |
The successive emission of two -particles from a radioactive atom results in the decrease of atomic number by 1 |
(c)
1. False. The electronic configuration of (atomic number 30) is . There are no unpaired electrons, hence, it is diamagnetic
2. False. In emission, the atomic number of daughter element is increased by 1, due to the basic conversion of neutron into proton in the nucleus
3. True. An -particle is . Hence, atomic number and mass number of daughter element are decreased by 2 and 4, respectively
4. False. There will occur an increase in atomic number by 2