Unit 2: Atomic Struct. & Mod. (Atomic # and Isotopes & Ions) CFU

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

How do you calculate the mass number?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the charge of a neutral atom?

Back

A neutral atom has no charge, meaning the number of protons equals the number of electrons.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is a cation?

Back

A cation is a positively charged ion, formed when an atom loses one or more electrons.

Front

What is an anion?

Back

An anion is a negatively charged ion, formed when an atom gains one or more electrons.

Front

How do you determine the net charge of an atom?

Back

Net charge = Number of protons - Number of electrons.

Front

What does the symbol 'a' represent in atomic notation?

Back

The symbol 'a' typically represents the mass number of an atom.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.