A
anything that has mass and takes up space
matter
atomic number gives:
a) how many protons
b) how many neutrons
a) how many protons
outermost shell (far away from nucleus) and can hold up to 8 electrons (meaning 8 or less)
electron shell 2
to find the number of neutrons you have to ______ the mass number and atomic number
a) multiply
b) subtract
subtract
the measure of how much matter is in an object
mass
What speed do electrons move?
a high speed
the smallest unit of matter
Atom
the measure of how much space something takes up
where can you find protons and neutrons?
in the nucleus
the inner most shell (closest to the nucleus) and can hold up to 2 electrons (meaning 2 or less)
electron shell 1
an orbit in which electrons move
electron shell
What has a negative (-) charge?
electrons
what are atoms made of?
protons, neutrons, & electrons
D = m/v
what do we measure if an element is unknows?
density
If an object is not easy to measure, we can use ___________ to find the volume
water displacement
what is the formula for volume?
V = L x W x H
What has NO charge (0) ?
neutron
the dense center of an atom
Nucleus
what has a positive (+) charge?
protons