chemical reactions 2 Flashcards
1
Q
what do the atoms do in a chemical reaction?
A
rearrange themselves
2
Q
atoms are not created or destroyed in a?
A
chemical reaction
3
Q
does the atoms at the start of the reaction stay until the end of the reaction?
A
YES
4
Q
what happens to the bonds in a reaction?
A
broken and then made
5
Q
do the atoms change or alter around in a reaction?
A
NO
6
Q
what doesn’t change in a reaction?
A
the mass
7
Q
what happens when the reactants change into a product?
A
no mass is lost or gained
8
Q
is the total number of each type of atom the same from the start to the end?
A
YES
9
Q
do reactions always give out and take in heat energy?
A
YES
10
Q
what can you seen in the reaction mixture?
A
visible changes
11
Q
what does the visible changes show?
A
a new substance has been formed
