# Why is the mass number of oxygen 16?

## Why is the mass number of oxygen 16?

Because protons and neutrons are roughly equal in mass, an isotope’s number is equal to the sum of its protons and neutrons. Therefore, oxygen 16 has 8 protons and 8 neutrons, oxygen 17 has 8 protons and 9 neutrons, and oxygen 18 has 8 protons and 10 neutrons.

What is the mass number of oxygen 17?

16.999131
CHEBI:33819 – oxygen-17 atom. The stable isotope of oxygen with relative atomic mass 16.999131. The least abundant (0.038 atom percent) isotope of naturally occurring oxygen.

### Is the atomic mass of oxygen is 16?

Oxygen-16 (16O) is a stable isotope of oxygen, having 8 neutrons and 8 protons in its nucleus. It has a mass of 15.99491461956 u. Oxygen-16 is the most abundant isotope of oxygen and accounts for 99.762% of oxygen’s natural abundance. The neon-burning process creates additional 16O.

Do Oxygen 17 and 18 have the same mass number?

Which statement is true about oxygen-17 and oxygen-18? They do not have the same number of protons. Their atoms have an identical mass. Determined by adding the number of protons and neutrons.

## What is the atomic mass of oxygen – 16?

Oxygen-16 ( 16O) is a stable isotope of oxygen, having 8 neutrons and 8 protons in its nucleus. It has a mass of 15.99491461956 u.

What is the atomic number of oxygen – 16?

Atomic mass Of oxygen is 15.99u or 15.99 amu. And the mass no. Of oxygen is 16 because total no. Of protons and neutrons (in oxygen 16) is 16.

### What is oxygen’s mass number?

Oxygen is one of the most abundant elements on planet Earth and in the universe. Oxygen has an atomic number of eight, and the molar mass of oxygen is approximately 15.9994.

What is the mass of one molecule of oxygen?

Oxygen has 8 protons and eight neutrons, so it’s molecular mass is 16u. As the Periodic table shows, the atomic mass of O is just slightly less than 16, so round off to 16. The oxygen molecule is O2, so it’s molecular mass is 2 X 16 = 32.