Question

4
unlike neutral atoms, ions have charges because they
have unequal numbers of protons and electrons.
given this information, which two substances in the
table are ions?

Explanation:

Step1: Determine the charge for each substance

For a neutral atom, the number of protons equals the number of electrons. For an ion, the number of protons and electrons are different.

• Substance A: Protons = 3, Electrons = 3. Charge = \(3 - 3=0\) (neutral)
• Substance B: Protons = 35, Electrons = 36. Charge = \(35 - 36=- 1\) (ion)
• Substance C: Protons = 19, Electrons = 18. Charge = \(19 - 18 = + 1\) (ion)
• Substance D: Protons = 16, Electrons = 16. Charge = \(16 - 16=0\) (neutral)

Answer:

Substance B and Substance C.