Match the descriptions (a)–(e) with the following terms: atomic weight, atomic mass, mass number, atomic number, molar mass. (a) The mass of a specific atom such as one atom of 13C (b) The quantity determined by the number of protons in an element. (c) The number of grams in 1 mol of an element (d) The number of protons and neutrons in an element (e) The weighted average of the isotopic masses of an element's naturally occurring isotopes

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Identify the term that describes the mass of a specific atom, such as one atom of \(^{13}\text{C}\). This is known as the 'atomic mass'.

Determine which term is defined by the number of protons in an element. This is referred to as the 'atomic number'.

Recognize the term that represents the number of grams in 1 mol of an element. This is called the 'molar mass'.

Find the term that describes the total number of protons and neutrons in an element. This is known as the 'mass number'.

Identify the term that refers to the weighted average of the isotopic masses of an element's naturally occurring isotopes. This is called the 'atomic weight'.

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Atomic Mass

Atomic mass refers to the mass of a specific atom, typically measured in atomic mass units (amu). It is often represented as the mass of a single isotope, such as 13C, which accounts for the number of protons and neutrons in the nucleus of that atom.

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02:19

Atomic Mass

Atomic Number

The atomic number is the number of protons found in the nucleus of an atom of an element. This number uniquely identifies the element and determines its position in the periodic table, as well as its chemical properties.

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Atom Structure

Molar Mass

Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It is numerically equivalent to the atomic or molecular weight and is used to convert between the mass of a substance and the amount in moles, facilitating stoichiometric calculations in chemistry.

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