How can we help?

You can also find more resources in our Help Center.

18 terms

physical science chapter 15 test review

STUDY
PLAY
protons, neutrons, and electrons
An atom is composed of subatomic particles called
electrons
These are shared or exchanged when molecules form
neutrons
elements have the same number of protons as
periodic tables are organized by
protons or atomic number
what is atomic mass?
the number of protons
how many elements are known?
100
what do electrons attract?
protons
each elements have the same
protons
what has the largest mass in a atom?
neutron
Atomic mass isnt a whole number due to differences in neutrons or
isotopes
you can change an atom to a different one by
adding or subtracting protons
if you add one proton and one neutron to chlorine, you have
argon
if you subtract two protons and two neutrons from oxygen, you have
carbon
list the layers of shells in atoms
2,8,8,18
This was formed by using the outer electron shell of the atom
lewis dot diagram
atoms from your body come from other things says
scientists
the hydrogen atom has _ electron,_proton, and _ neutrons
1,1,0
what are two examples of noble elements?
neon and helium