Keyword Analysis & Research: definition of mass number in chemistry

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What does the mass number in Chemistry represent?

Mass number is an integer (whole number) equal to the sum of the number of protons and neutrons of an atomic nucleus. In other words, it is the sum of the number of nucleons in an atom.

What is the definition of molar mass in chemistry?

Molar mass. In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles.

What does molar mean in chemistry?

Molar refers to the unit of concentration molarity, which is equal to the number of moles per liter of a solution. In chemistry, the term most often refers to molar concentration of a solute in a solution.

What is an and Z in chemistry?

A is used to signify the atomic mass number (also known as atomic mass or atomic weight) of an atom. A = # protons + # neutrons . A and Z are integer values . When the actual mass of an atom is expressed in amu (atomic mass units) or g/mol then the value is close to A.


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