lab safety
what is the safest type of eye protection?
eye wear/goggles
what is a example of physical change
this creates the atomic mass number
the protons neutrons and electrons
what is length"?
the distance between 2 points
what is the difference between a group and a period?
groups are verticle and periods are horozontal
what object is used to put liquid in?
Beaker
what is a chemical change?
odor,rust or combustion
a proton has what kind of charge
positive
what is mass?
amount of matter in an object
what side of the table are metals and non-metals?
left side: Metals
Right side: non-metals
if something in the lab breaks, who do you tell?
An adult/teacher
this type of change transitions from one state of matter to another
what is physical change?
a neutron has what kind of charge
negative
interval between 2 events
alkali metal, gases, metals, transition elements, halogens
what is your personal saftey equiptment called?
PPE
what does the conservation of mass state
a electron has what king of charge?
length x Width x Hight =?
volume
why was Mendeleev's periodic table widely accepted?
it correctly predicted the properties of elements
This is the safest way to smell a chemical
what is wafting?
this is happens when a bomb goes off
chain reaction
how many electrons can be in the outermost shell to be stable?
8
mass/volume=?
density
what is the ionic ratio of aluminum to oxygen in the ionic compound aluminum oxide?
2 aluminum atoms and 3 oxygen