Show:
Atoms & Elements
Families & Categories
Atomic Models/Notation
Periodic Table
Periodic Trends & Periodicity
100
The center of an atom, made of proton and neutrons
What is The Nucleus
100
Elements that are good conductors of heat and electricity, and are often ductile, or malleable.
What are Metals
100
The first atomic model to contain electrons
What is Thomson's Model
100
The rows of the periodic table
What are Periods
100
A Periodic Trend that decreases in size from left to right along a period.
What is Atomic Radius.
200
The lightest particle in an atom
What is an electron
200
A family of elements with 7 valence electrons
What are Halogens
200
The model in which atoms are thought of as indivisible balls of different masses.
What is Dalton's model
200
The columns of the Periodic table
What is Groups or Families
200
The temperature at which a gas will condense into a liquid
What is Boiling Point
300
An atom with 3 electron orbitals and six valence electrons
What is Sulphur
300
These elements are often used to make semiconductors, important materials for transistors, and lasers.
What are Metalloids
300
A representation of an atom that consists of only the chemical symbol of an atom, and its valence electrons
What is Lewis notation
300
The increasing unit by which the periodic table is organized.
What is Atomic Number
300
The ability of an atom to gain or attract electrons.
What is electronegativity
400
A particle that does not effect the chemical properties of an atom.
What is the neutron
400
A family of elements that can often be found in their elemental state (uncombined) in nature
What are Noble Gases
400
The first model to show different orbital or electron energy levels.
What is the Rutherford-Bohr Atomic Model
400
An atomic particle that members of a family have the same number of
What are valence electrons
400
The property that allows Helium to rise in air.
What is Density
500
The lightest alkali metal.
What is Lithium
500
A family of elements that consists of more than one category of elements
What are Halogens
500
The only model that contains all the particles of an atom.
What is the simplified atomic model.
500
An atomic measurement that is based on Carbon-12
What is Relative Atomic Mass
500
The Energy required to remove and electron from the outermost shell of an atom.
What is 1st Ionization Energy