End of Q3 Chemistry Review

Front

What is a multiple covalent bond?

Back

A multiple covalent bond is a type of chemical bond where two atoms share more than one pair of electrons. Examples include double bonds (two pairs of electrons) and triple bonds (three pairs of electrons).

Front

Which molecule contains a multiple covalent bond?

Back

O₂ (oxygen) contains a double bond between two oxygen atoms.

Front

What is the direction of heat flow between two objects at different temperatures?

Back

Heat flows from the object at a higher temperature to the object at a lower temperature.

Front

If an object is at 20 °C, to which temperature will heat flow?

Back

Heat will flow to an object at 15 °C.

Front

What is the natural tendency of systems in nature?

Back

Systems in nature tend to change toward lower energy and greater disorder.

Front

What is solubility?

Back

Solubility is the ability of a substance to dissolve in a solvent, typically water.

Front

Which compound has very low solubility in water according to Table F?

Back

Calcium phosphate has very low solubility in water.

Front

What is the approximate mass of a proton?

Back

The mass of each proton is approximately 1 u (atomic mass unit).

Front

What is the approximate mass of a neutron?

Back

The mass of each neutron is approximately 1 u (atomic mass unit).

Front

What is the difference between an ionic bond and a covalent bond?

Back

An ionic bond is formed by the transfer of electrons from one atom to another, while a covalent bond is formed by the sharing of electrons between atoms.