Atoms, Isotopes and Ions

Front

What do elements in the same group of the periodic table have in common?

Back

They have the same number of valence electrons.

Front

How many valence electrons does Lithium (Li) have?

Back

1

Front

Where are protons located in an atom?

Back

Protons are found in the nucleus, or center of the atom.

Front

How do positive ions form?

Back

Positive ions form by losing electrons.

Front

What is an isotope?

Back

An isotope is an atom with different amounts of neutrons.

Front

What are the three main subatomic particles in an atom?

Back

Protons, neutrons, and electrons.

Front

What charge do protons carry?

Back

Protons carry a positive charge.

Front

What charge do electrons carry?

Back

Electrons carry a negative charge.

Front

What is the mass number of an atom?

Back

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

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.