1. | is not important because nuclear forces are short-ranged |
2. | is as important as electrostatic force for binding the two atoms |
3. | cancels the repulsive electrostatic force between the nuclei |
4. | is not important because oxygen nucleus have equal number of neutrons and protons |
1. | \(M = m_{\text{proton}}+ m_{\text{electron}}.\) |
2. | \(M = m_{\text{proton}}+ m_{\text{electron}}-\frac{B}{c^2}\left(B= 13.6~\text{eV}\right)\). |
3. | \(M\) is not related to the mass of the hydrogen atom. |
4. | \(M = m_{\text{proton}}+ m_{\text{electron}}-\frac{|V|}{c^2}(|V|=\) magnitude of the potential energy of electron in the \(\text H\text-\)atom). |
\(M_x\) and \(M_y\) denote the atomic masses of the parent and the daughter nuclei respectively in radioactive decay. The \(Q\text -\)value for a \(\beta^{-}\) decay is \(Q_1\) and that for a \(\beta^{+}\) decay is \(Q_2.\) If \(m_e\) denotes the mass of an electron, then which of the following statements is correct?
1. | \(\small[Q_1=\left(M_x-M_y\right) c^2 \text { and } Q_2=\left[M_x-M_y-2 m_e\right] c^2 \) |
2. | \( \small[Q_1=\left(M_x-M_y\right) c^2 \text { and } Q_2=\left(M_x-M_y\right) c^2 \) |
3. | \(\small[Q_1=\left(M_x-M_y-2 m_e\right)c^2 \text { and } Q_2=\left(M_x-M_y+2 m_e\right) c^2 \) |
4. | \(\small[Q_1=\left(M_x-M_y+2 m_e\right) c^2 \text { and } Q_2=\left(M_x-M_y+2 m_e\right) c^4 \) |