which symbol below correctly identifies an element with 16 protons, 18 neutrons, and 18 electrons? a…

which symbol below correctly identifies an element with 16 protons, 18 neutrons, and 18 electrons? a. $_{16}^{16}ar^{+1}$ b. $_{18}^{16}ar^{-1}$ c. $_{18}^{34}s^{+2}$ d. $_{16}^{34}s^{-2}$

which symbol below correctly identifies an element with 16 protons, 18 neutrons, and 18 electrons? a. $_{16}^{16}ar^{+1}$ b. $_{18}^{16}ar^{-1}$ c. $_{18}^{34}s^{+2}$ d. $_{16}^{34}s^{-2}$

Answer

Explanation:

Step1: Determine element by protons

Atomic number = protons = 16 → element is S (sulfur).

Step2: Calculate mass number

Mass number = protons + neutrons = 16 + 18 = 34.

Step3: Determine charge

Charge = electrons - protons = 18 - 16 = -2 (anion).

Step4: Identify correct symbol

Symbol: (_{16}^{34}S^{-2}) (matches option d).

Answer:

d. (_{16}^{34}S^{-2})