Periodic Table Nick Scott

A proton is a particle that has a positive charge.

A nucleus is the atom’s center and it is made of protons and neutrons.

A neutron is a particle that has no charge.

An electron is a particle that has a negative charge.

Orbital is a region in an atom where there is high probability of finding electrons.

A valence electron is an electron that is found in the outer most she’ll of an atom and determines the atom’s chemical property.

The periodic law is the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements.

A period is a horizontal row of elements on the periodic table.

A vertical row on the periodic table.

A metal is an element that is shiny and conducts heat and electricity.

A nonmetal is an element that conducts hear and electricity poorly.

A semiconductor is an element that is in between a metal and a nonmetal.

An alkali metal is one of the elements of Group 1.

An alkaline-earth metal is one of the elements in Group 2.

A transition metal is one of the elements in Groups 3-12.

A halogen is an element of Group 17.

A Nobel Gas is an element of the Group 18.

An ion is an atom or group of atoms that has lost or gained an electron.

An atomic number is the number of protons and electrons of an atom.

The mass number is the sum of the numbers of protons and neutrons in the nucleus of an atom.

An isotope is atom that has the same number of protons as other atoms of the same element do but that has different number of neutrons.

An amu is the unit for the atom.

Average atomic mass is the mass of the atom.

A mole is the SI base unit used to measure the amount of a substance whose number of particles is the same as the number of atoms.