Question

This is how osmium appears in the periodic table.A purple box has O s at the center and 76 above. Below it says osmium and below that 190.23.

Rounded to the nearest whole number, how many neutrons, on average, are in an atom of osmium?

76
114
190
266

Answer 1

Atomic number = 76 (protons). Mass ≈ 190.23 → round to 190 (mass number).
Neutrons ≈ 190 − 76 = 114.

Answer: 114.