Alchemy Quiz 13

Why do different atoms bond together to make compounds?

• Because atoms need an equal number of protons and electrons.

• So the atoms can get rid of extra energy in their electrons.

• Because the atoms are more stable with full outer shells of electrons.

• So the atoms can gain electrons.

Which statement best illustrates the “rule” for forming ionic compounds?

• The total number of electrons and protons must be a multiple of 8.

• The total number of electrons must be a multiple of 8.

• The total number of ions must be a multiple of 8.

• The total number of valence electrons must be a multiple of 8.

Bromine gains one electron to form which ion?

• Br⁺¹

• Br^-1

• Br⁺²

• Br^-2

Mg and O combine to form the ionic compound magnesium oxide. What is the correct formula for magnesium oxide?

• MgO₂

• Mg₂O

• MgO

• Mg₂O₂

Tags

NGSS.MS-PS1-1

What is the correct formula for the compound magnesium chloride?

• MgCl₂

• Mg₂Cl₃

• Mg₂Cl

• MgCl

Tags

NGSS.MS-PS1-1

Which of these compounds will NOT form?

• ArCl₂

• Na₂S

• AlCl₃

• NaCl

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these compounds does NOT occur?

• LiCl

• MgCl₂

• AlCl₃

• CaCl

Tags

NGSS.MS-PS1-1

Which compound can be made with these cards?

• K₂O

• K₂Ca

• K₂Cl₂

• Cl₂O

• KO

Tags

NGSS.MS-PS1-1

An ionic compound is formed when:

• a neutral compound gains an electron.

• a cation bonds to an anion.

• a hydroxide ion bonds to a nitrate ion.

• an atom gains an electron.

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NGSS.MS-PS1-5

Two groups of the periodic table are highlighted in the image. What is the metal to nonmetal ratio of ionic compounds formed from these groups?

• 1:1

• 1:2

• 2:1

• 2:7

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NGSS.MS-PS1-1

NGSS.MS-PS1-2