ACP Midterm Unit 2 review (for 24-25)

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 charge of an atom with 8 protons, 8 neutrons, and 10 electrons?

Back

The charge is -2, calculated as the difference between protons and electrons (8 - 10 = -2).

Front

Where is most of the mass of an atom found?

Back

Most of the mass of an atom is found in the nucleus.

Front

What does the mass number represent in an isotope?

Back

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

Front

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

Back

Subtract the atomic number (number of protons) from the mass number.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the electron cloud?

Back

The electron cloud is the region around the nucleus of an atom where electrons are likely to be found.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons in the nucleus.

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.