Periodic Table

Front

What is the Periodic Table?

Back

A tabular arrangement of chemical elements, organized by increasing atomic number, electron configuration, and recurring chemical properties.

Front

What does each row in the Periodic Table represent?

Back

Each row (period) represents the number of electron shells in the atoms of the elements.

Front

What does each column in the Periodic Table represent?

Back

Each column (group) contains elements that have similar chemical properties and the same number of valence electrons.

Front

What is atomic mass?

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

Who is credited with the discovery of the electron?

Back

J.J. Thomson is credited with the discovery of the electron in 1897.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that determine its chemical properties and reactivity.

Front

How many valence electrons does an element in Group 1 have?

Back

Elements in Group 1 have 1 valence electron.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom's nucleus and determines the element's identity.

Front

What is a noble gas?

Back

Noble gases are elements in Group 18 of the Periodic Table that are inert and have full valence electron shells.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically shiny, conductive, and malleable, while nonmetals are dull, insulative, and brittle.