Periodic Table Intro

Front

What is the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). It is usually found at the bottom of each square on the periodic table.

Front

How did Mendeleev arrange the elements in the periodic table?

Back

Mendeleev arranged the elements by increasing atomic mass, which helped to identify patterns in their properties.

Front

What are noble gases?

Back

Noble gases are a group of elements in group 18 of the periodic table that are known for being inert and non-reactive due to their full valence electron shell.

Front

What is the chemical symbol for Lithium?

Back

The chemical symbol for Lithium is Li.

Front

What is group 18 on the periodic table known as?

Back

Group 18 is known as the noble gases.

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

What are alkali metals?

Back

Alkali metals are the elements found in group 1 of the periodic table, known for being highly reactive and having one electron in their outer shell.

Front

What are alkaline earth metals?

Back

Alkaline earth metals are the elements in group 2 of the periodic table, characterized by having two electrons in their outer shell and being less reactive than alkali metals.

Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter notation used to represent an element on the periodic table.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.