Question

17 protons and 18 neutrons what is the mass number and atomic number

Answer 1

The Atomic number is 17 and Mass number is 35

Step-by-step explanation:

Given;

• No. of protons = 17
• No. of neutrons = 18

To Find;

• Atomic number
• Mass number

So, For Atomic number

Atomic Number = No. of protons = No. of electrons = 17 (Which is Chlorine {Cl} )

Now, For Mass number

Mass number = No. of protons + No. of neutrons

Mass number = 17 + 18 = 35

Thus, The Atomic number is 17 and Mass number is 35

-TheUnknownScientist 72