Question

Which of the following belongs to the group of Doberiener's triad?
1 Calcium, strontium, and barium
2 Chlorine, bromine, and iodine
3 Hydrogen, lithium, and sodium
4 Phosphorus, vanadiurn and niobium

please answer​

Answer 1

Answer:

2

Explanation:

2 answer is correct check if u want tell mi your reply and plz follow

Answer 2

$\sf\underline{Answer:}$

Option 1 and 2 belong to the Doberiener's triad