An element is in M3+ form. Its electronic configuration is [Ar] 4s1 . What is the atomic number of element?

Question

An element is in M3+ form. Its electronic configuration is [Ar] 4s1 . What is the atomic number of element? (A) 21 (B) 19 (C) 24 (D) 22

Tardigrade Admin · Accepted Answer

When element is in M3+ form, its electronic configuration is [Ar] 4s1, hence, electronic configuration of M will be [Ar] 4s23d2. Hence, atomic number of element (M) = 18 + 4 = 22.

Q. An element is in $M^{3 +}$ form. Its electronic configuration is $[A r] 4 s^{1}$ . What is the atomic number of element?

21

19

24

22

When element is in $M^{3 +}$ form, its electronic configuration is $[A r] 4 s^{1},$ hence, electronic configuration of M will be $[A r] 4 s^{2} 3 d^{2} .$ Hence, atomic number of element (M) = 18 + 4 = 22.

Q. An element is in M3+ form. Its electronic configuration is [Ar]4s1 . What is the atomic number of element?

21

19

24

22

When element is in M3+ form, its electronic configuration is [Ar]4s1, hence, electronic configuration of M will be [Ar]4s23d2. Hence, atomic number of element (M) = 18 + 4 = 22.

Q. An element is in $M^{3 +}$ form. Its electronic configuration is $[A r] 4 s^{1}$ . What is the atomic number of element?

When element is in $M^{3 +}$ form, its electronic configuration is $[A r] 4 s^{1},$ hence, electronic configuration of M will be $[A r] 4 s^{2} 3 d^{2} .$ Hence, atomic number of element (M) = 18 + 4 = 22.