How many neutrons does element x have if it’s atomic number is 35 and it’s mass number is 77?

Element X has 42 neutrons

Explanation:

To find the number of neutrons in an element you can simple subtract the atomic number by the mass number. So in this case 77-35=42

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

it is a solid

explanation: