chemical reactions - intro Flashcards
the basics
1
Q
what is all matter made of?
A
atoms!
2
Q
what is matter?
A
matter is any substance that has mass and takes up space.
3
Q
what happens during a chemical reaction?
A
during a chemical reaction new substances are produced by rearranging atoms.
4
Q
left side of an equation = ?
A
reactants
5
Q
right side of an equation = ?
A
products
6
Q
what is the law of conservation of mass’s general rule?
A
mass is neither created nor destroyed in a chemical reaction.
7
Q
what happens during the law of conservation of mass?
A
the atoms of the starting materials are rearranged in a chemical reaction to form new substances.
8
Q
signs that a new substance has formed?
A
a solid appears/disappears, bubbles (release of gas), colour change.
