Chemistry Test Review (24-25)

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.

Front

How do you calculate the number of neutrons in an isotope?

Back

Subtract the atomic number (number of protons) from the mass number (total number of protons and neutrons).

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 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

What is the Bohr model of the atom?

Back

The Bohr model is a representation of the atom where electrons orbit the nucleus in defined paths or energy levels.

Front

What is the mass number of an atom?

Back

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

Front

How many protons does a neutral atom of magnesium-26 have?

Back

A neutral atom of magnesium-26 has 12 protons.

Front

What is the electron configuration of a lithium ion (Li+) ?

Back

The electron configuration of a lithium ion (Li+) is 1s².

Front

What is the significance of the neutron in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus.