. periodic table * sub-shell
Diagrammatic questions
What factors do the valencies of elements depend upon?
A part of a periodic table is given below. Study it and answer the follow
ii. Sketch the atomic structure of that element which is placed in period 3
vi. transition element
IIA
IVA
IIIA
IA
VA
Be B. С N
Li
O
Periods 2
Mg
Si
Al
3. Na
Р S СІ
i Write the names of two very reactive non-metals.
questions.
VIA VIIA
O
Ne
F
Ar
has valency 4.
ii. Name the most reactive metal with a suitable reason.
study the given electronic configuration of the elements and answer the follo
questions.
A. 2,8,1 B.2,8 C. 2,8,7 D. 1