Chemistry
Name
(a) An alkali metal in period 3 and halogen in period 2.
(b) The noble gas with 3 shells.
(c) The non-metals present in period 2 and metals in period 3.
(d) The element of period 3 with valency 4.
(e) The element in period 3 which does not form oxide.
(f) The element of lower nuclear charge out of Be and Mg.
Periodic Table
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Answer
(a) Alkali metal in period 3 = Sodium
Halogen in period 2 = Fluorine
(b) Argon (Ar).
(c) Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), Neon (Ne) are non-metals in period 2.
Sodium (Na), Magnesium (Mg) and Aluminium (Al)are metals in period 3.
(d) Silicon (Si).
(e) Argon (Ar).
(f) Be will have lower nuclear charge then Mg.
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