Physical Science Chapter 14

When two elements come together to form a compound, which element is named first within the name of the compound?

The element toward the left hand side of the periodic table.

What chemical change occurs when a wax candle burns?

The heated wax molecules combine with oxygen molecules.

A chemical change involves the formation or breaking of

a chemical bond.

Which of the following is an example of a chemical change? a) gasoline being used in the engine of a car producing exhaust b) water freezing into ice crystals c) aftershave or perfume on your skin generating a smell d) a piece of metal expanding when heated, but returning to original size when cooled e) breaking a glass window

a) gasoline being used in the engine of a car producing exhaust

Which of the following is an example of a physical change? a) water boiling and being converted into steam b) water being electrolyzed and being converted in hydrogen and oxygen c) iron metal reacting with oxygen to form rust d) a candy bar being digested by a student e) charcoal being converted into ash

a) water boiling and being converted into steam

What is the name of the following compound? NaF

sodium fluoride