ExamPlay Light Logo
Вход

WAEC - Chemistry (1997 - No. 2)

The mass number of an element is the sum of its
electrons, neutrons and protons
electrons and protons
protons and neutrons
orbital electrons
valence electrons

Коментари (0)

Влезте, за да коментирате
Реклама
BrainBehindX Inc Logo
©2026; Осъществено от BrainBehindX Inc