Question

a chlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Answer 1

Mass = p + n

Atomic number/mass are the same thing if i am wrong i am sorry look it up :)

Answer 2

The mass no. is "35" and the atomic no. is "17".

Given,

Number of Protons,

• 17

Number of Neutrons,

• 18

Now,

→ The atomic number of Chlorine will be:

= $Number \ of \ Protons$

= $17$

and,

→ The mass number will be:

= $Number \ of \ Protons+Number \ of \ Neutrons$

= $17+18$

= $35$

Thus the above answer is right.

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