The sum of the numbers of protons and neutrons of an atom is called its ______ - Science

The sum of the numbers of protons and neutrons of an atom is called its ______

रिक्त स्थान भरें

The sum of the numbers of protons and neutrons of an atom is called its Mass number.

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अध्याय 7: Atoms and Molecules - Evaluation [पृष्ठ १०३]

अध्याय 7 Atoms and Molecules
Evaluation | Q II. 4. | पृष्ठ १०३

Define the atomic mass unit.

What is meant by saying that 'the atomic mass of oxygen is 16' ?

Explain the need for a reference atom for atomic mass. Give some information about two reference atoms.

Define the following form:

Atomic mass number

What are polyatomic ions? Give two examples.

Define the term:

Mass number

The average atomic mass of hydrogen is ______ amu.

Answer the following question using the data given below:

Assertion: The Relative Atomic mass of aluminium is 27
Reason: An atom of aluminium is 27 times heavier than 1/12th of the mass of the C – 12 atom.

Calculate the % of oxygen in Al₂(SO₄)₃. (Atomic mass: Al-27, O-16, S -32)

Calculate the % relative abundance of B-10 and B-11, if its average atomic mass is 10.804 amu.