Question

An isotope of Oxygen has 8 protons, 10 neutrons, and 8 electrons. What is the atomic mass of this isotope?

Answer 1

The atomic mass of this isotope is 18.

Step-by-step explanation:

Given that,

Number of proton = 8

Number of neutron =10

Number of electron = 8

Atomic mass :

Atomic mass is the addition of number of neutron and number of proton or electron.

We need to calculate the atomic mass of this isotope

Using formula of atomic mass

`A=N+P`

Where, N = number of neutron

P = number of proton

Put the value into the formula

`A=10+8`

`A=18`

Hence, The atomic mass of this isotope is 18.

Answer 2

18

Step-by-step explanation:

An isotope an atom of a particular element is another atom having same number of protons or electrons but different number of neutrons.

For example oxygen

element proton neutron

O-16 8 8

O-17 8 9

O-18 8 10

Now atomic mass of atom = no. of protons +no. of neutrons

therefore, mass number of Oxygen has 8 protons, 10 neutrons, and 8 electrons. = 8+10 =18.