physical science chapter 15 test review
protons, neutrons, and electrons
An atom is composed of subatomic particles called
These are shared or exchanged when molecules form
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?
what do electrons attract?
each elements have the same
what has the largest mass in a atom?
Atomic mass isnt a whole number due to differences in neutrons or
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
if you subtract two protons and two neutrons from oxygen, you have
list the layers of shells in atoms
This was formed by using the outer electron shell of the atom
lewis dot diagram
atoms from your body come from other things says
the hydrogen atom has _ electron,_proton, and _ neutrons
what are two examples of noble elements?
neon and helium