Question

Name the following
© Horizontal rows in the modern periodic table
valency
@ An element
having atomic noll &
group
atomic no 18
③ A zero
element
having
@ first element lanthanide series
First element
actinide series
@A
of the
gzop of elements having 3 incomplete outermost shell
@
Q2 at write ele chronic.confiqursion of
Magnesium
Aluminium
Chlorine-
Potassium -
Sulphat
Argon​

Answer 1

Answer:

• periods
• Argon

2. Mg=2,8,3

Al=2,8,3

Cl=2,8,7

S=2,8,6

Ar=2,8,8