Question

question 7 (1 point) charge1. how many electrons are in a cu²⁺ ion? 65 27 29 61 31

Explanation:

Step1: Recall copper's atomic number

Copper (Cu) has an atomic number of 29, which means neutral Cu has 29 electrons.

Step2: Analyze the ion charge

A $\text{Cu}^{2 +}$ ion has a +2 charge, meaning it has lost 2 electrons.

Step3: Calculate electron number

$29 - 2=27$. So, a $\text{Cu}^{2 +}$ ion has 27 electrons.

Answer:

B. 27