Exploring Bonding in Simple Compounds

Which type of bond is formed when electrons are transferred from one atom to another?

• Covalent bond

• Ionic bond

• Metallic bond

• Hydrogen bond

What is the term for the force that holds two atoms together in a molecule?

• Lattice energy

• Chemical bond

• Ionization energy

• Atomic radius

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NGSS.HS-PS1-1

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Which of the following compounds contains a covalent bond?

• NaCl

• MgO

• KBr

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NGSS.MS-PS1-1

Which property is most commonly associated with ionic compounds?

• High melting point

• Low solubility in water

• Poor electrical conductivity when molten

• Soft and flexible structure

• Ionic bond

• Metallic bond

• Covalent bond

• Hydrogen bond

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NGSS.HS-PS1-1

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Which of the following best describes a metallic bond?

• Sharing of electron pairs between atoms

• Attraction between positive ions and delocalized electrons

• Transfer of electrons from one atom to another

• Attraction between hydrogen and oxygen atoms

Which of the following is a property of substances with covalent bonds?

• Conduct electricity in solid state

• Have low melting and boiling points

• Are always soluble in water

• Form crystal lattices

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NGSS.HS-PS1-1

Which of the following best explains why NaCl conducts electricity when dissolved in water but not in solid form?

• The ions are free to move in solution

• The covalent bonds are broken in water

• The electrons are shared in solution

• The atoms become neutral in water

• NaCl, because it is an ionic compound

• MgO, because it has a higher charge on its ions

• All have equal bond strength

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NGSS.HS-PS1-3

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Why do covalent compounds generally have lower melting points than ionic compounds?

• Covalent bonds are stronger than ionic bonds

• Covalent compounds have weaker intermolecular forces

• Ionic compounds are always gases at room temperature

• Covalent compounds are always metals