Periodic Table Trends

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

• groups

• towers

• periods

• atomic numbers

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The Modern Periodic Table of Elements is arranged by

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

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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The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

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Elements in a ..................have similar chemical properties.  

• period
• group
• row

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Elements in the same column of the periodic table always have the same # of _______ as one another.

• Protons
• Neutrons
• Electrons
• Valence Electrons

• 2
• 3
• 5

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How many valence electrons are in an atom of K?

• 3
• 8
• 4
• 1

How many valence electrons are in an atom of Ar?

• 2
• 8
• 4
• 1

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NGSS.MS-PS1-1

Which element could be lustrous and brittle?

• A
• B
• G
• L

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