Periodic Table

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

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Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

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Sodium (Na) is found in group 

• 1
• 2
• 3
• 4

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The phases of the moon are __________ because they repeat in a pattern.

• periodic
• group
• awesome
• halogens

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What does the atomic mass tell you? 

• Basically,the number of electrons and protons
• The number of neutrons
• Basically, the number of protons and neutrons
• The number of protons.

The atomic number tells you what?  READ THE ANSWERS CAREFULLY

• only the number of electrons
•  only the number of protons
• only the number of neutrons
• the number of both electrons and protons in an atom.

The atoms we study in 6th grade are neutral, which means they have the same number of

• protons and electrons
• protons and neutrons
• electrons and neutrons

What does the 6 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

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NGSS.HS-PS1-1

What does 12.011 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

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NGSS.HS-PS1-1