Question

ion class sheet #1
ion – an atom with an overall charge due to unequal numbers of protons (+) and electrons (-)
anion – ion with an overall negative (-) charge
cation – ion with an overall positive (+) charge
... (left - side text with numbers and circles)

1. number of protons?

20

1. number of electrons?

18

1. overall charge?

type a response

1. ion?

type a response

Explanation:

Question 49: Overall charge?

Step1: Recall charge formula

Overall charge = (Number of protons) - (Number of electrons)

Step2: Substitute values

Protons = 20, Electrons = 18
Charge = \( 20 - 18 = +2 \)

An ion has unequal protons/electrons. Here, protons (20) ≠ electrons (18), so it’s an ion (specifically a cation, as charge is positive).

Answer:

+2

Question 50: ion?