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Elements
Trends
Compounds
Properties
Mic.
100
What element has the smallest atomic radius?
What is Hydrogen?
100

The trend of an atom or molecule defined by the amount of energy released or spent when an electron added to a neutral atom or molecule in the gaseous state to form a negative ion.(Increases from left to right; down to up.) Is called?

What is electron affinity.
100
The group on a periodic table highly reactive with water.
What is Alkali Metals?
100
The group that contains the most highly reactive elements.

What is alkali metals?

100
The most recently discovered element.

What is ununpentium?

200

The element with an atomic number of 26 located within the transition metal, and is commonly used in civil engineering to manufacture steel.

What is Iron? (Ag)
200
The inversely proportional trend to electronegativity that tells of an elements size.
What is atomic radius?
200
The scientific name for water. 
What is Dihydrogen monoxide?
200
The number of electrons on the third electron shell of an atom.
What is 18?
300
The particle in an atom's nucleus shown by the atomic number on an element.
What is protons?