JEE Mains · Chemistry · STD 11 - 2. structure of atom
A monoatomic anion \((A^-)\) has \(45\) neutrons and \(36\) electrons. Atomic mass, group in the periodic table and physical state at room temperature of the element \((A)\) respectively are
- A \(80, 17\), liquid
- B \(81, 16\), solid
- C \(80, 16\), gas
- D \(81, 15\), gas
Answer & Solution
Correct Answer
(A) \(80, 17\), liquid
Step-by-step Solution
Detailed explanation
Number of electrons in \(A^{-}\) is \(36\). Number of electrons in neutral atom \(A = 36 - 1 = 35\). Atomic number of \(A = 35\). Number of protons in \(A = 35\). Atomic mass of \(A = \text{Number of protons} + \text{Number of neutrons} = 35 + 45 = 80\). The element with atomic…
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