Question

what is the mass number of an ion with 104 electrons, 159 neutrons, and a +1 charge? express your answer as an integer. view available hint(s)

Explanation:

Step1: Find the number of protons

For an ion with a \(+1\) charge, the number of protons \(p\) is related to the number of electrons \(e\) by the formula \(p=e + 1\). Given \(e = 104\), then \(p=104 + 1=105\).

Step2: Calculate the mass number

The mass number \(A\) is the sum of the number of protons \(p\) and neutrons \(n\). Given \(p = 105\) and \(n=159\), then \(A=p + n=105+159\).

$$A=105 + 159=264$$

Answer:

\(264\)