## What is atomic weight of oxygen?

15.999 uOxygen / Atomic mass

Why is the atomic weight of oxygen 16?

Atomic mass of an element is the relative mass of its atom as compared with the mass of a carbon-12 atom taken as 12 units. Hence, atomic mass of oxygen is 16 u means that one atom of oxygen is 16 times heavier than 1/12 of a carbon-12 atom.

How would you explain atomic weight?

The total weight of an atom is called the atomic weight. It is approximately equal to the number of protons and neutrons, with a little extra added by the electrons. The stability of the nucleus, and hence the atom’s radioactivity, is heavily dependent upon the number of neutrons it contains.

### Why is the atomic mass of oxygen?

Hydrogen, the lightest element, was assigned a relative mass of ‘1’, and the other elements were assigned ‘atomic masses’ relative to this value for hydrogen. Thus, oxygen was assigned an atomic mass of 16.

What is the atomic mass of oxygen for class 9th?

The mass of an oxygen atom = 16 amu.

How do you find the atomic mass of oxygen in Class 9?

atomic mass = mass of one atom of an element / (1/12th) of the mass of one atom of carbon. Easy way to calculate atomic mass of oxygen atom. The atomic mass of the oxygen atom is given by 15.9994 amu i.e. nearly 16.

#### Is the atomic mass of oxygen 15 or 16?

The atomic mass of oxygen is 16u.

What is the atomic mass of oxygen Class 9?

What is atomic weight class 11?

Atomic mass in an atom or group of an atom is the sum of the masses of protons, neutrons and electrons.

## What is the formula of atomic weight?

Atomic weight: The sum of mass number of proton and mass number of neutron is called atomic weight or atomic mass number (A). Z = 19 and A = 39 as per atomic weight definition. Isotopes: Atoms of the same element contains different number of neutrons, are called isotopes.

How is oxygen weighed?

Oxygen weighs 0.001429 gram per cubic centimeter or 1.429 kilogram per cubic meter, i.e. density of oxygen is equal to 1.429 kg/m³; at 0°C (32°F or 273.15K) at standard atmospheric pressure.

What is the molecular weight of o2?