Random
Tells you the number of protons in an element.
Atomic Number
The center of the atom is called this.
Nucleus
The element with an atomic number of 82.
Lead
Iodine is part of this family.
Halogens
The top four elements in our body are
C, N, O, and H
Subtract the atomic number from the atomic mass
Particles in the atom with a positive charge.
Proton
What element has an atomic mass of 238.
U, Uranium
The smallest noble gas.
Helium
The most abundant element in the universe.
Hydrogen.
Elements with unstable nuclei that break down spontaneously and give off energy.
Radioactive
The charge of a neutron is this.
Neutral
The most reactive metal family.
Alkali metals
Nitrogen.
The number of liquids at room temperature on the Periodic Table.
2
Electrons surround the protons and neutrons in these.
Electron shells
The first nonmetal on the Periodic Table
Hydrogen.
The only family with all three states of matter.
Halogens.
Toxic metal that is a liquid at room temperature.
Mercury
Uranium or Plutonium
Subatomic particle with "no" mass
Electrons
The first metal on the periodic table
Lithium
The lanthanides and actinides are part of this family.
Inner transition metals.
Number of electron shells that Uranium has.
7