Term | Definition |
atoms | the building blocks of matter (protons, neutrons, electrons) |
element | A pure substance (all atoms have the same atomic number or number of protons) |
nucleus | the center of an atom, it contains the protons and neutrons |
proton | particles that have a positive charge |
neutron | particles that do not have a charge and are neutral |
electron | particles that have a negative charge |
atomic number | the number of protons and electrons found in an element |
atomic mass | the mass of an atom |
shells | energy levels where the electrons are found |
valence electron | the electrons in the outer most shell, determines bonding |
periods | horizontal rows on the table that tell how many shells the element will have on the Bohr Model. |
groups | vertical columns on the periodic table that tell the number of valence electrons |
Noble Gases | group 18 on the periodic table. These elements have full outer shells |
The three subatomic particles | protons, neutrons, electrons |
The two subatomic particles that make up atomic mass | protons and neutrons |
inert | full or stable |
location of metals on the periodic table | on the left side of the zig-zag line |
location of non-metals on the periodic table | on the right side of the zig-zag line |
location of metalloids | on either side of the zig-zag line |
what group are the alkali metals | group 1 |
what is another name for the alkaline earth metals | group 2 |
Bohr Model | shows the entire structure of the atom |
which two subatomic particles have an atomic mass unit of 1 | protons and neutrons |