Which element is in Group 1, Period 3?
ALithium
BSodiumCORRECT
CPotassium
DMagnesium
WAECChemistry
AI
Toaster Teacher
Why the answer is B, and why the others tempt you.
Sodium (Na): Z=11, electron config 2,8,1 → Group 1, Period 3.
Want this in Pidgin, Yoruba, Igbo or Hausa? Sign up free →
Practice more Chemistry questions
WAEC Chemistry has thousands more questions like this — with Worked answers on every one.