Category 1 STAAR Review part 2

Which is correctly labeled?

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Tags

NGSS.MS-PS1-1

Which of the following decreases as you move from left to right across this portion of the periodic table?

• atomic mass

• number of electron orbitals (energy levels)

• number of valence electrons

• metallic character of the element

Which is labeled correctly?

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• 

Identify the metal in period 3 that is more reactive than magnesium.

• Aluminum - Al

• Sodium - Na

• Chlorine - Cl

• Boron - B

Identify the noble gas with 2 valence electrons.

• Aluminum - Al

• Sodium - Na

• Helium - He

• Neon - Ne

Identify the element in group 17 with 5 energy levels or shells.

• Iodine - I

• Sodium - Na

• Chlorine -Cl

• Xenon - Xe

Identify the element that has more valence electrons than fluorine and fewer energy levels than sodium.

• Argon - Ar

• Sodium - Na

• Chlorine -Cl

• Neon - Ne

Identify the metalloid in period 3 with more protons than sodium and fewer valence electrons than chlorine.

• Aluminum - Al

• Silicon - Si

• Chlorine -Cl

• Argon - Ar

Tags

NGSS.MS-PS1-1

A coefficient tells you how many there are.

• elements

• molecules

• compounds

• atoms

A subscript tells you how many there are.

• elements

• molecules

• compounds

• atoms