Periodic table

A rule that states that repeating chemical and physical properties of elements change periodically with the atomic number of the elements is the _________.

• periodic law
• alkaline-earth metals
• actinide
• group rule

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Pure forms of these elements are stored in oil so they won't react with oxygen and water in the air.

• Alkali Metals
• Alkaline-earth metals
• Halogens
• Noble Gases

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All of the actinides are ___________.

• stable
• radioactive
• shiny
• named after scientists

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NGSS.HS-PS1-8

Most of the elements on the periodic table are classified as _____.

• Metals
• Nonmetals
• Metalloids
• Periods

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This class of elements are sometimes called "semiconductors."

• Metals
• Nonmetals
• Metalloids
• Groups

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Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

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Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

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Which element is not a metal?

• Na

• Re

• Al

• B

The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

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Which is a halogen?

• Helium
• Chlorine
• Oxygen
• Neptune

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