U2 Parts of an Atom

Front

What is a cation?

Back

A cation is an atom that has lost electrons.

Front

Can the number of protons in an atom be changed?

Back

No, you cannot change the number of protons in an atom.

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in an atom.

Front

What is an isotope?

Back

An isotope is an atom that has a different number of neutrons compared to other atoms of the same element.

Front

How is the periodic table arranged?

Back

The periodic table is arranged by atomic number.

Front

What is the charge of a cation?

Back

A cation has a positive charge.

Front

What happens to an atom when it gains electrons?

Back

When an atom gains electrons, it becomes an anion, which has a negative charge.

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.

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

What defines an element?

Back

An element is defined by the number of protons in its nucleus.