From the artg of the periodic table given, answer the following questions
1 litium
2
13
14 Carbon
15
16 Oxygen
17
18 neon
X
S
P
L
Y
Q
Z
R
T
Name the family of L,Q,R,T.
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Solution
Name of the family is halogen family that contains L=chlorine,Q=bromine,R=iodine and T=astatine. The 17th group belongs to halogen family and the first number is fluorine with atomic no.9.