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