Atoms, Elements, Molecules, Compounds

Elements are made of 

• many types of atoms 
• the periodic table
• one type of atom 
• molecules 

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All matter is made of 

• energy 
• atoms 
• electrons 
• compounds 

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Two or more atoms chemically bonded together are called a

• atom
• element
• molecule
• mixture

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How many hydrogen atoms are there in a water molecule? 

• 0
• 1
• 2
• 3

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This subatomic particle of an atom has a POSITIVE charge.

• electron
• neutron
• proton
• amitron

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Protons and neutrons clump together to form the __________ of an atom.

• nucleus
• centrosome
• outer shell
• orbital

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This subatomic particle of an atom has NO charge.

• electron
• proton
• atom
• neutron

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This subatomic particle of an atom has a NEGATIVE charge.

• electron
• proton
• atom
• neutron

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The image shows the periodic grid of potassium. How many electrons are found in the potassium atom?

• 19

• 20

• 39

• 40

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Which part of an atom is represented by the blue circles?

• electrons

• neutrons

• protons

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