Atom, Isotopes & The Periodic Table

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is the mass number of an atom?

Back

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

Front

How do you calculate the mass number of an atom?

Back

Mass number = Number of protons + Number of neutrons.

Front

What are isotopes?

Back

Isotopes are atoms of the same element with different numbers of neutrons.

Front

What is the atomic number of an atom?

Back

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

Front

What is the significance of the atomic number?

Back

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

Front

What are groups in the periodic table?

Back

Groups are the vertical columns in the periodic table that contain elements with similar chemical properties.

Front

What are periods in the periodic table?

Back

Periods are the horizontal rows in the periodic table that indicate the number of electron shells in the elements.

Front

What are alkaline earth metals?

Back

Alkaline earth metals are the elements in Group 2 of the periodic table, known for being reactive and having two electrons in their outer shell.

Front

Give an example of an alkaline earth metal.

Back

Calcium is an example of an alkaline earth metal.