Question

Match the atomic number 17, 18, 12, 11, 6 with each of the following:

i). a non metal with valency 1

ii). a metal with one electron in the third shell

iii). an element with two electrons in valency shell

iv). a non metal with valency 4

v) a gas belonging to zero group
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Answer 1

Answer:

i)17

ii)11

iii)12

iv)18

v)6

Explanation:

i)2, 8, 7 =17

ii)2,8,1 =11

iii)2,8,2=12

iv)2,8,8=18

v)=0

Answer 2

a non metal with valency 1 is chlorine its atomic number is 17.

a metal with one electron in the third shell is sodium with atomic number 11.

an element with two electrons in the valence shell is magnesium its atomic number is 12.

nonmetal with valency for carbon its atomic number is 6.

against belonging to 0 group is argan its atomic number is 18.