Question

Calcium and Argon are examples of a pair of _________________

Answer 1

Elements having same atomic mass are known as isobars.

Atomic mass of Argon g Calcium is 40.
So, they are examples of $Isobars$.

Answer 2

answer : calcium and Argon are example of a pairs of isobar.

explanation :

Calcium , Ca :

• atomic number = 20
• atomic mass = 40 amu

Argon, Ar

• atomic number = 20
• atomic mass = 40 amu

here it is clearly shown that atomic mass of calcium = atomic mass of Argon.

we know, if mass of number of two different elements are same then these elements are a pair of isobar

hence, Calcium and Argon are example of a pair of isobar.