Question

Which of the following sets belong to the same period?
a) Li, Na, K
b) Li, Mg, Ca
c) Ni, Cu, Za
d) F, CI, Br

Answer 1

Among these Ni, Cu, Zn belongs to the same group

Answer 2

Hey dear,

◆ Answer -

(c) Ni, Cu, Zn

◆ Explanation -

Ni, Cu & Zn all three belong to 4th period of modern periodic table.

◆ Arrangement of elements in modern periodic table -

• Elements are arranged in increasing order of their atomic numbers in modern periodic table.
• Horizontal rows in periodic table are called periods. There are total of 7 periods.
• Vertical columns in periodic table are called groups. There are total 18 groups.

Hope this helped you.