Week 1 Physical Change and Etc
Week 1 Sig Figs and Dimensional Analysis
Week 2 Atomic numbers and electrons
Week 2 Laws and Etc
100
Define physical change as well as chemical change.
a physical change is a change in properties such as texture, shape, or state, while a chemical change represents the formation of a new substance after atoms are rearranged in a chemical reaction.
100
3
100
62
100
Protons orbit around the nucleus of the atom
*Electrons are what actually orbit the nucleus
200
5.967 mL
200
3 sig figs
200
18
*A neutral Ca atom would have 20 electrons but the +2 would remove 2 electrons making 18 e-
200
1.68%
300
fireworks exploding
300
Convert 0.618 g to cg
300
104 Carbon atoms
*take 8 x 13
300
118.944 amu
400
weight
400
1.846 x10-3
400
6 Hydrogens
400
11.54 Y