Lesson: Atomic Numbers and Mass Numbers Glencoe Science • Chemistry • Concepts and Applications • Glencoe • Chemistry • Matter & Change • Chemical Interactions • Chemistry • The Molecular Nature of Matter and Change • Eighth Edition • Chemistry 13e • AP Edition • Introductory Chemistry Essentials • Sixth Edition • Glencoe Science • Chemistry • Matter and Change

Chemistry

In this lesson, we will learn how to define and calculate the atomic numbers of elements and mass numbers of isotopes.

Video

13:33

Q1:

Neon has an atomic number of 10. How many protons are there in an atom of neon?

Q2:

An aluminum atom has an atomic number of 13 and a mass number of 27.

How many protons are there in an atom of aluminum?

How many neutrons are there in an atom of aluminum?

How many electrons are there in an atom of aluminum?

Q3:

A fluorine atom has an atomic number of 9 and a mass number of 19.

How many protons are there in an atom of fluorine?

How many neutrons are there in an atom of fluorine?

How many electrons are there in an atom of fluorine?

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