Final

Front

What is the atomic number?

Back

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

Front

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

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is the atomic mass of an atom?

Back

The atomic mass is the weighted average mass of an atom's isotopes, measured in atomic mass units (amu).

Front

What is an isotope?

Back

An isotope is two atoms of the same element that have different numbers of neutrons.

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 charge of a neutral atom?

Back

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

Front

How many electrons does an atom with atomic number 30 and a +2 charge have?

Back

28 electrons.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number determines the position of an element in the periodic table and its chemical properties.

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.