Question

an atom has 15 protons, 17 neutrons, and 18 electrons. what is the overall charge? 3+ 2- 1- 3- 1+ 2+ rewatch

Explanation:

Step1: Define charge contributions

Protons have +1 charge, electrons have -1 charge; neutrons have 0 charge.

Step2: Calculate total positive charge

Total positive charge = Number of protons $\times (+1) = 15 \times (+1) = +15$

Step3: Calculate total negative charge

Total negative charge = Number of electrons $\times (-1) = 18 \times (-1) = -18$

Step4: Sum charges for overall charge

Overall charge = $+15 + (-18) = -3$

Answer:

3-