Question

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

Answer 1

Answer:

18

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.

Answer 2

Answer:

The atomic mass of this isotope is 18.

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.