Question

how does valence of an element vary across a period ​

Answer 1

Explanation:

it it decreases from left to right

Answer 2

Answer:

Valency across a period first increases then decreases

For ex :In period 3 the valency of the elements

Na-1

Mg-2

Al-3

Si-4

P-3

S-2

Cl-1

PLZ mark it as the brainliest answer

Explanation: