Compounds

Which of these is not an ionic compound?

• KF

• SiO₂

• Na₂SO₄

• Na₂O

Which statements are correct when barium and oxygen react to form an ionic compound? I. Each barium atom loses 2 electrons and forms a cation. II. Oxygen atoms form oxide anions (O²⁻). III. The ions are present in a one-to-one ratio in the compound.

• I and II only

• II and III only

• I and III only

• I, II, and III

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which choice describes what likely happens as IODINE forms an ion?

• gains two electrons

• loses two electrons

• gains three electrons

• loses one electron

• gains one electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which choice describes what likely happens as MAGNESIUM forms an ion?

• gains two electrons

• loses two electrons

• gains three electrons

• loses one electron

• gains one electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which choice describes what likely happens as CESIUM forms an ion?

• gains two electrons

• loses two electrons

• gains three electrons

• loses one electron

• gains one electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A bond in which two atoms share a pair of electrons is not

• a coordinate covalent bond

• a polar covalent bond

• an ionic bond

• a nonpolar covalent bond

How many valence electrons are in a molecule of phosphoric acid, H₃PO₄?

• 7

• 16

• 24

• 32

Which of these molecules can form a hydrogen bond with a water molecule?

• N₂

• NH₃

• O₂

• CH₄

Which substance contains both covalent and ionic bonds?

• NH₄NO₃

• CH₃OCH₃

• LiF

• CaCl₂

Which of these bonds is most polar?

• H - Cl

• H - Br

• H - F

• H - I