Ch 9: Chemical Bonding Review

______________bonds share valence electrons with other atoms

• covalent

• ionic

• electronic

• conductive

Which is not a reason why chemical bonds are important?

• Bonds create new elements

• Bonds are used to make new substances

• Building and breaking bonds are part of the energy cycle

• chemical bonds sustain life

A chemical reaction occurs when__________________.

• chemical bonds are built

• chemical bonds are broken

• a new substance is created

• all of the above

A(n)______________reaction happens when chemical bonds give off heat.

• exothermic

• endothermic

• metallic

• covalent

A(n)___________ reaction happens when chemical bonds take in heat.

• exothermic

• endothermic

• metallic

• covalent

If chemical bonds didn't exist, which statement would be true?

• Life would not exist

• substances would be limited to the elements in the periodic table

• energy would no exist

• all of the above

If an electron transfers from one atom to another atom, what type of bond will most likely form?

• covalent

• ionic

• metallic

Which would most likely be joined by an ionic bond?

• a positive metal ion and a positive nonmetal ion

• a positive metal ion and a negative nonmetal ion

• a negative metal ion and a positive nonmetal ion

• a negative metal ion and a negative nonmetal ion

What is shared in a metallic bond?

• negatively charged ions

• neutrons

• pooled valence electrons

• protons

Covalent bonds typically form between the atoms of elements that share

• nuclei

• oppositely charged ions

• protons

• valence electrons