Question

97.
The atomic number of which elements is
incorrect?
(a) Potassium (K)-19
(b) Argon (Ar) - 18
(c) Calcium (Ca) -20
(d) Titanium (TI) - 21​

Answer 1

Answer:

(d) => Titanium.

The atomic number of titanium is 22 .

Explanation:

hope it helps you

Answer 2

$\bold\orange{♡Answer♡}$

(a)Potassium (K)-19 ✔✔

(b)Argon(Ar)-18✔✔

(c)Calcium(Ca)-20✔✔

(d)Titanium(Ti)-21❌❌

Reason- Titanium has atomic number 22

Hence answer is option d

$\red{Answer=option(d)}$

hope it helps .

☆☆☆