Periodic Table

Front

What is the periodic table?

Back

A table that represents all known chemical elements.

Front

How many known elements are there in the periodic table?

Back

118

Front

What is the atomic number of an element?

Back

The number of protons

Front

How many energy shells do elements in the 4th period have?

Back

4

Front

Valence electrons

Back

Valence electrons are electrons in the outermost shell of an atom

Front

Which group is known to have reactive metals?

Back

Group 1

Front

What are the elements in Group 1 called?

Back

Alkali metals

Front

What is a common property of alkali metals?

Back

Highly reactive

Front

What is a property of noble gases?

Back

Non-reactive

Front

Which group contains non-metals that are reactive?

Back

Group 7