History
list the discoveries that Dalton made
1. discovered that atoms were the smallest things
2. atoms are not divisible
3. atoms of the same thing are the same
4. atoms combine to make new things
what is whims
workplace hazardous materials system
atomic weight
what was the name of the topic for this unit
Chemistry
what did thomson discover
what are 2 of the symbols meaning
poison
explosive
oxidizer
health hazard
corrosive
flamable
compressed
environmental hazard
irritant
how many periods are there
how many groups are there
7
18
what are the types of bonding
ionic compounds
molecular compounds
what did rutherford discover
what are protons and a nucleus
atoms are mostly empty with + in the middle
what is hhps
household hazardous product symbols
what are the major names of the groups
what is the difference between the different types of compounds
ionic have metals
molecular are not gasses
molecular share electrons
ionic transfer electrons
what did bohr discover
believed electrons move around in shells with different energy levels
what do the shapes mean in hhps
octogon is content danger
triangle is container danger
what is the step on the periodic table
metaloids
what is the answer
42
what did chadwick discover
electrons move in orbitals, different paths around the nucleus
where does glass go when it breaks
tell the teacher
they clean it up
they put it in the bin under the sink near the door
who made the periodic table
Mendeleev
what was the lab in the test about