Forming and Breaking Bonds

Which equation represents energy being absorbed as a

bond is broken?

• H + H --> H₂

• H₂ (g) --> H₂ (s)

• H₂ (s) --> H₂ (g)

• H₂ --> H + H

Tags

NGSS.HS-PS1-4

Which statement describes the energy changes that occur as bonds are broken and formed during a chemical reaction?

• Energy is absorbed when bonds are both broken and formed.

• Energy is released when bonds are both broken and formed.

• Energy is absorbed when bonds are broken, and energy is released when bonds are formed.

• Energy is released when bonds are broken, and energy is absorbed when bonds are formed.

Tags

NGSS.HS-PS1-4

Given the equation representing a reaction:

O + O --> O₂

Which statement describes the changes that occur as

the oxygen molecule is produced?

• Energy is absorbed as bonds are broken.

• Energy is absorbed as bonds are formed.

• Energy is released as bonds are broken.

• Energy is released as bonds are formed.

Tags

NGSS.HS-PS1-4

Given the equation representing a reaction:

H₂(g) + I₂(g) —> 2HI(g)

Which statement describes the energy changes

that occur in this reaction?

• Energy is absorbed as bonds are formed, only.

• Energy is released as bonds are broken, only.

• Energy is absorbed as bonds are formed, and

  energy is released as bonds are broken.

• Energy is absorbed as bonds are broken, and

  energy is released as bonds are formed.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which element reacts with oxygen to form ionic

bonds?

• calcium

• hydrogen

• chlorine

• nitrogen

Which term is used to describe the attraction that an

oxygen atom has for the electrons in a chemical bond?

• alkalinity

• electronegativity

• electron configuration

• first ionization energy

Which property is used to determine the degree of

polarity between two bonded atoms?

• density

• electronegativity

• pressure

• temperature

Which bond is least polar?

• As-Cl

• Bi-Cl

• P-Cl

• N-Cl

If the electronegativity difference between the

elements in compound NaX is 2.1, what is element X?

• bromine

• chlorine

• fluorine

• oxygen

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which type of bonding is usually exhibited when the

electronegativity difference between two atoms is

1.1?

• ionic

• covalent

• metallic

• network