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# What is the simple definition of atomic mass?

## What is the simple definition of atomic mass?

atomic mass, the quantity of matter contained in an atom of an element. It is expressed as a multiple of one-twelfth the mass of the carbon-12 atom, 1.992646547 × 10−23 gram, which is assigned an atomic mass of 12 units. In this scale, 1 atomic mass unit (amu) corresponds to 1.660539040 × 10−24 gram.

## What is atomic mass in 11th class?

Atomic mass of an element is the number of times an atom of that element is heavier than an atom of carbon taken as 12. One atomic mass unit is equal to one-twelfth of the mass of an atom of carbon 12 isotope.

How do you explain atomic mass unit?

An atomic mass unit (symbolized AMU or amu) is defined as precisely 1/12 the mass of an atom of carbon-12. The carbon-12 (C-12) atom has six protons and six neutrons in its nucleus. In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass.

### What is atomic mass give example?

It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes. Foe example: Atomic mass of Na is 23 u. Sodium has 11 protons and 12 neutrons, hence it is equal to 11 + 12 = 23.

### What is atomic mass Class 8?

Atomic mass can be defined as the total mass of one atom of any given element. The unit of atomic mass is called the unified atomic mass unit (denoted by ‘u’). Most of the atomic mass of a substance is made up of protons and neutrons. Therefore, it is almost equal to its mass number.

What is atomic mass Brainly?

Answer: An atomic mass unit (symbolized AMU or amu) is defined as precisely 1/12 the mass of an atom of carbon -12. The carbon -12 (C -12) atom has six protons and six neutrons in its nucleus. The AMU is used to express the relative masses of, and thereby differentiate between, various isotopes of elements.

## What is atomic mass class 9th?

Atomic mass refers to the mass of an atom. It depicts how many times an atom of an element is heavier than one-twelth (1/12th) the mass of one atom of carbon-12 of mass of one carbon atom. The relative atomic masses of all elements have been established with reverence to an atom of carbon-12.

What is amu Class 9?

An atomic mass unit is a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12. OR. The atomic mass unit (amu) is defined as 1 / 12th of the mass of an atom of carbon.

### What is atomic mass Class 9 CBSE?

What is atomic mass Class 11 Brainly?

## How do you calculate atomic mass?

Note that the relative atomic masses listed on the periodic table are average values for the associated element.

• Relative atomic masses,as listed on the periodic table,are used to calculate molar masses for atoms and molecules.
• For example,the atomic mass of iron is 55.847 amu,which means one mole of iron atoms would weigh 55.847 grams.
• ## What does that atomic mass tell you?

The atomic mass tells us the weight of protons and neutrons. How do you know how many electrons there are surrounding the nucleus of a particular atom? You subtract the amount of protons from the atomic mass

What is the formula for calculating atomic mass?

Atomic mass unit

• SI units of atomic mass,
• Mass number
• Atomic Symbol
• Atomic stability
• ### What is atomic mass and how is it determined?

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.