SCIENCE CHEMICAL REACTION TRUE OR FALSE

true

A reaction type can be identified by studying the reactant and products shown in the chemical equation

false

An element is a substance made up of different kinds of atoms bonded together

True

a chemical change has the same meaning as a chemical reaction

false

a combustion reaction often produces sodium chloride and water

false

a combustion reaction usually releases ions and light

false

a physical bond is an attraction between atoms so electrons are shared

true

adding electric energy to water molecules can cause the bonds between hydrogen and oxygen to break

True

Chemical bonds must break and new bonds must form for atoms to rearrange

False

In a physical change, atoms of one or more substances rearrange to form one or more new substances.

True

Substances have fixed arrangements of atoms

true

The negative ions in two compounds switch places in a double-replacement

false

atoms disappear during a chemical change

false

burning fossil fuels produces energy through decomposition reaction

false

combining hydrogen and oxygen to form water is an example of a double- replacement reaction

false

combustion reactions always contain hydrogen as a reactant

true

decomposition is the reverse of synthesis

false

dynamite exploding is an example of a synthesis chemical reaction

false

hydrogen and oxygen combining to form water is an example of a physical change

false

in a single replacement reactions and in a synthesis reaction, elements change places with other elements in compounds

true

light causes the decomposition of hydrogen peroxide

false

synthesis reactions always involve oxygen

false

the thickening of syrup when it is put into the refrigerator is an example of a chemical change