Chemical Bonding

A substance which has a high melting point, conducts electricity when dissolved in water, and has a crystalline structure probably has what type of bond?

• Ionic
• Metallic
• Covalent
• Crystalline

Tags

NGSS.HS-PS1-3

What type of bond occurs when two or more elements share electrons?

• Ionic
• Covalent
• Metallic
• Caring

Which statement best describes the energy change as bonds are formed and broken in this reaction?
      H₂ + Cl₂  ➔  2HCl

• The forming of the H-Cl bond releases energy
• The forming of the H-Cl bond absorbs energy
• The breaking of the H-H bond releases energy
• The breaking of the Cl-Cl bond releases energy

Tags

NGSS.HS-PS1-4

A solid substance is an excellent conductor of electricity. The chemical bonds in this substance are most likely?

• ionic, because the valence electrons are shared between atoms
• covalent, because the valence electrons are mobile
• metallic, because the valence electrons are stationary
• metallic, because the valence electrons are mobile

Tags

NGSS.HS-PS1-3

Which formula represents an covalent compound?

• CO₂
• Ag
• FeCl₃
• Cs₃P

An atom that gains an electron in an ionic bond becomes a/an _______________ charged ion.

• Negatively
• Positively

Is the molecule H₂O polar or non-polar?

• polar
• non-polar

Tags

NGSS.HS-ESS2-5

What usually forms the positive ion?

• Metal
• Non Metals
• None

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What elements generally make an ionic bond?

• metal and nonmetal
• 2 or more nonmetals
• metal
• none of the above

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A covalent bond in which there is an unequal attraction for the shared electrons is

• polar

• nonpolar

• ionic

• dipolar