Question

For an element X , it is given that atomic number = 17 and mass number = 35

a. What will be the formula of the compound formed between X and Y having

valency 3 ?​

Answer 1

Step-by-step explanation:

Mass number of element is 35

Number of neutrons= 18

Formula to find number of protons:

Mass number = number of protons + number of neutrons.

35=× +18

×=35 - 18

X=17.

Number of protons =17 and number of electrons also will be 17 as atom is electrically neutral.

Hence Element is chlorine