A valence electron is an electron that is in the ______ occupied energy level of an atom.

• Highest
• Lowest
• Endemic
• Medium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Across a period, the number of valence electrons increases from ____ to ____.

• Irksome 
• Left to Right
• High to low
• Right to Left

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Alkali metals are in what group?

• 1A
• 1D
• 2A
• 3A

Tags

NGSS.HS-PS1-1

Sodium chloride (table salt), a familiar compound, can be obtained through evaporation of _____.

• Geysers
• Seawater
• Your saltiness
• Rivers

 Differences in reactivity   among the alkaline earth metals are shown by the ways they react with ____.

• Water
• Boron
• Arsenic
• Chinchillas

Tags

NGSS.HS-PS1-2

What is the most abundant metal in Earth's crust?

• Scandium
• Copper
• Aluminum
• Lead

Boron, aluminum, gallium, indium, and thallium each have how many valence electrons?

• 4
• 7
• 2
• 3

Tags

NGSS.HS-PS1-1

 Elements in a group have similar properties because...?

• ...they are the same as in (metalliod, metal, nonmetal)
• ...they have different numbers of valence electrons 
• ...they have the same number of valence electrons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Most of the compounds in your body contain carbon, except for....?

• H2O
• PB
• Ca

Much of the _______ obtained from air is used to produce fertilizers.

• Nitrogen
• Oxygen
• Hydrogen
• Helium