Beta Decay

Q.

A nucleus with Z = 92 emits the following in a sequence: $\alpha ,{\beta }^{-},{\beta }^{-},\alpha ,\alpha ,\alpha ,\alpha ,\alpha ,{\beta }^{-},{\beta }^{-},\alpha ,{\beta }^{+},{\beta }^{+},\alpha ,$ The Z of the resultant nucleus is

1. 74

2. 76

3. 78

4. 82

Q.

During a negative beta decay, a neutron in the nucleus decays emitting an electron.

1. An atomic electron is ejected
2. An electron which is already present within the nucleus is ejected

Q. An atomic nucleus denoted by ${}_Z^{A}X$ emits an $\alpha -particle$. Write an equation to show the formation of the daughter product.
A certain radioactive nucleus emits a particle that leaves it unchanged but increases its atomic number by one. Identify the particle and write its symbol.
[3 MARKS]

Q.

A nucleus with Z = 92 emits the following in a sequence: $\alpha ,{\beta }^{-},{\beta }^{-},\alpha ,\alpha ,\alpha ,\alpha ,\alpha ,{\beta }^{-},{\beta }^{-},\alpha ,{\beta }^{+},{\beta }^{+},\alpha$. Then, the Z of the resultant nucleus is

1. 56

2. 74

3. 82

4. 44

Q.

In beta decay, an electron, $e^{-}$ (or a positron, $e^{+}$) is emitted by a nucleus. What happens to the atom, among the following options?

1. The atom gets positively charged if is emitted, or negatively charged if is emitted
2. The atom gets negatively charged if is emitted, or positively charged if is emitted
3. Any of the three can take place, depending on other factors.
4. The atom stays neutral, since a proton is also created to balance the charge

Q.

If a Calcium atom with atomic number 20 and mass number 41 undergoes a ${\beta }^{-}$ (beta minus)
The value of Z is__ and A is___in the daughter nucleus.

1. $A=31$, $Z=41$

2. $A=21$, $Z=41$

3. $A=22$, $Z=41$

4. $A=21$, $Z=42$

Q.

In which radioactive disintegration does the neutron dissociate into proton and electron?

1. $\beta -emission$
   

2. $\gamma -emission$
   

3. $positronemission$

4. $H{e}^{++}-emission$
   

Q.

A nucleus ${}_Z^{A}X$ going through a ${\beta }^{+}$ decay will end up taking what configuration?

1. 
2. 
3. 
4. 

Q.

During a negative beta decay, a neutron in the nucleus decays emitting an electron.

1. An electron which is already present within the nucleus is ejected
2. An atomic electron is ejected

Q. The nucleus B(with $84$ protons and $126$ neutrons) emits a $\beta$-particle and is transformed into a nucleus C. What is the composition of C?

1. $83$ protons and $125$ neutrons
2. $85$ protons and $125$ neutrons
3. $84$ protons and $125$ neutrons
   
4. $83$ protons and $126$ neutrons
   

Q. The diagram below shows a cathode ray tube in which the arrow indicates a beam of charged particles approaching an electric field between the plates A and B. State the amount of charge on each particle.

1. $1.6\times {10}^{-19}C$
2. $-1.6\times {10}^{-19}C$
3. 0
4. $-1.16\times {10}^{-19}C$

Q.

In beta decay, an electron, $e^{-}$ (or a positron, $e^{+}$) is emitted by a nucleus. What happens to the atom, among the following options?

1. The atom gets negatively charged if is emitted, or positively charged if is emitted
2. The atom gets positively charged if is emitted, or negatively charged if is emitted
3. Any of the three can take place, depending on other factors.
4. The atom stays neutral, since a proton is also created to balance the charge