Question

isame se jo tik kiya hai wah mat batana jo Nahi kiya hai bata dena​

Answer 1

Answer:

In chemistry, the valence or valency of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules

Step-by-step explanation:

Answer 2

12) Average number =sum of numbers/ total count of number

Now sum of first 10 natural numbers = 5×11 = 55

because sum of n natural numbers = n(n+1)/2

Now average =55/10 = 5.5