Question

the atomic number of two elements A and B are 17 and 20 respectively.the formula of the compound formed between A and B is options are B2A,BA,BA2 and BA3

Answer 1

Answer:ba2

Explanation: the electronic configuration of...

A is 2,8,7 and b is 2 ,8,8,2 so two atoms of A combine with B so ans. Is BA2

Answer 2

Answer:

BA₂

Explanation:

• The atomic number of A=17
• The electronic configuration of A=2,8,7
• valence of A=1

• The atomic number of B=20
• The electronic configuration of B=2,8,8,2
• valence of B=2

On Combining both the elements,

B₂ × A

Ionic bond forms as it is a bond between metal and non-metal and the compound

BA₂ is formed.