Atomic Structure and Periodic Table

Front

What is the basic structure of an atom?

Back

An atom consists of negative particles (electrons) that orbit around a dense positively charged nucleus (made of protons and neutrons).

Front

What determines the identity of an element?

Back

An element's identity is determined by the number of protons in its nucleus.

Front

What are the horizontal rows on the periodic table called?

Back

Horizontal rows on the periodic table are called periods.

Front

How many periods are there in the periodic table?

Back

There are 7 periods in the periodic table.

Front

What is the charge of protons?

Back

Protons have a positive charge.

Front

What is the charge of electrons?

Back

Electrons have a negative charge.

Front

What is the charge of neutrons?

Back

Neutrons have no charge (they are neutral).

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

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 an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.