Periodic Table Review

Front

Who was the first scientist to propose the atomic theory?

Back

John Dalton

Front

What is the atomic number of oxygen?

Back

8

Front

What does the atomic number represent in an element?

Back

The number of protons in the nucleus of an atom.

Front

Which group in the periodic table contains all non-metals that are extremely reactive?

Back

Group 17 - Halogens

Front

How many valence electrons are in an atom of nitrogen?

Back

5

Front

What is the significance of valence electrons?

Back

They determine how an element reacts chemically with other elements.

Front

What is the atomic mass of oxygen?

Back

Approximately 15.999

Front

What are noble gases?

Back

Group 18 elements that are mostly unreactive due to having a full valence shell.

Front

What is the difference between metals and non-metals?

Back

Metals are typically shiny, conductive, and malleable, while non-metals are dull, insulative, and brittle.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number.