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Periodic Table Groups
Subatomic Particles
Periodic Table Patterns
Famous Experiments
Element Characteristics
100

This is the group of elements that exists in the second vertical column. 

What is Alkaline Earth Metals? 

100

Aside from neutrons, the other known nucleon is this subatomic particle

What is a proton?


100

This refers to the strength in which protons of one atom attract the electrons of another.

What is electronegativity?
100

Experiment that discovered all atoms have a nucleus that houses its positive charge.

What is the Gold Foil Experiment?

100

Refers to the number of nucleons present in an atoms nucleus.

What is mass number?

200

This is the nonreactive group that exists in the far right column.

What is the noble gases?

200

This is the negatively charged wave-particle duality that exists outside an atom's nucleus.

What is an electron?

200

This refers to distance from an atom's nucleus to its outer most shell.

What is atomic radius?

200

An experiment that showed all atoms contain tiny, negatively charged electrons.

What is the Cathode Ray Experiment?

200

Refers to average weight of all isotopes of an element measured in atomic mass units.

What is relative atomic mass? 

300

This group contains important elements that are essential for human life.

What is the nonmetals.

300

This is the area of an atom in which electrons exist.

What is the electron cloud? 

300

This is the minimal energy required to remove the most loosely bound valence electron from an atom.

What is ionization energy? 

300

This experiment measured and identified electron charge.

What is the Oil Drop Experiment?
300

Refers to the number of protons in an atom's nucleus.

What is atomic number? 

400

These metals often have valence electrons in two shells instead of one.

What is the transition metals?

400

The subshells in which electrons spent 90% of their time within their electron energy shells.

What are electron orbitals? 

400

This refers to an elements level of reactivity and tendency to loose electrons. 

What is metallic character? 

400
Experimental theory that states all matter is made of atoms, all atoms of a given element are identical in property, and atoms can bond to form compounds.
What is Dalton's Atomic Theory?
400
Refers to the ease in which an element allows electricity to pass through it.

What is electrical conductivity?

500
Known as silvery-white metals that tarnish when exposed to air.

What is the lanthanides? 

500

This is the type of subatomic particle that helps stabilize protons and can sometimes lead to spontaneous decay.

What is neutrons?

500

The change of energy of a neutral atom when an electron is added to form an anion.

What is electron affinity? 

500
Experimental theory that states elemental properties are a periodic function of their atomic weight.
Mendeleev Theory 
500
Refers to the characteristic of an element to be hammered out of shape without breaking or cracking.

What is malleability?