Atomic Structure and Periodic Table

Front

What are the vertical columns in the Periodic Table called?

Back

Groups

Front

What element is represented by the atomic symbol He?

Back

Helium

Front

Why are elements in group 18 stable?

Back

They have 8 valence electrons and a full outer shell.

Front

What is the main reason group 1 elements are highly reactive?

Back

They have 1 valence electron.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is a valence electron?

Back

An electron in the outermost shell of an atom that can participate in chemical bonding.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What is the significance of the Periodic Table?

Back

It organizes elements based on their atomic number and properties.

Front

What are periods in the Periodic Table?

Back

Horizontal rows that indicate the number of energy levels in an atom.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Tags

NGSS.MS-PS1-1

Front

What is the difference between metals and nonmetals?

Back

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