Physical Science: Valence Electrons

A Lewis diagram represents the:

• electrons in the outer shell.

• total number of electrons of an atom.

How many valence electrons are in the outer shell of Magnesium?

• 2

• 4

• 6

• 8

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NGSS.MS-PS1-1

Elements in Group 18 that have a full outer shell of electrons are called:

• Noble gases

• Alkali Metals

Noble gases are generally unreactive because they have:

• a full outer shell of valence electrons.

• a nonreactive inner shell of electrons.

Which group in the Periodic Table represents the most reactive group?

• Group 1

  (Alkali Metals)

• Group 2

  (Alkaline Earth Metals)

Valence electrons are the number of electrons in the:

• outer shell of an atom.

• inner shell of an atom.

Why is sodium so reactive?

• it has only one electron in its outermost shell.

• it has many electrons in its inner shell.

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NGSS.MS-PS1-1

How many valence electrons are in the outermost shell of Sulfur?

• 6

• 8

Tags

NGSS.MS-PS1-1

Item "B" is the:

• Nucleus

• Outer Shell

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NGSS.MS-PS1-1

Item "D" is a:

• Proton

• Electron

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NGSS.MS-PS1-1