Periodic Table Groups
Is Sodium a Metal or Nonmetal?
Metal
The first greek philosopher to say that atoms are indivisible particles.
Democritus
The charge of a neutron.
neutral
The meaning of the number at the end of the isotope name. (behind the hyphen)
mass
The last name of the man that is considered father of the periodic table.
Mendeleev
The third main group that has properties of both Metals and Nonmetals.
Metalloids
The name of the model that states that electrons move on orbits around the nucleus.
Bohr model
The two subatomic particles located in the nucleus.
proton and neutron
Number of neutrons in the isotope Oxygen-19
11
The number of total groups on the periodic table.
18
The group name of elements in column 18.
Noble Gases
The name of the most current theory.
Quantum mechanical model
The number of neutrons in Neon.
10
Atomic number of the Isotope Uranium-238
92
Number of natural elements.
94
The group name of the column that includes Fluorine.
Halogens
First and Last Name of the scientist who developed the plum-pudding theory.
JJ Thomson
Number of valence electrons of Lithium.
1
Number of Protons in the Isotope Sulfur-37
16
The direction in which atomic size increases.
right to left and top to bottom