When electrons are either added to or removed from an atom.
What is ionization?
100
Charge of a proton
What is positive?
200
Smallest piece of an element that retain the properties of the element.
What is an atom?
200
Largest subatomic particle.
What is a neutron?
200
Name for horizontal row on the periodic table.
What is period?
200
A positive ion.
What is a cation?
200
Charge of a neutron.
What is neutral or "doesn't have one"?
300
First person to use the term atom
Who is Democritus?
300
Found outside the nucleus?
What is an electron?
300
Periodic table is arranged by increasing ____________ number.
What is atomic (number)?
300
A negative ion.
What is an anion?
300
Any of the possible energies an electron may have in an atom
What is an energy level?
400
An English schoolteacher that developed an atomic theory.
Who is Dalton?
400
Found in the nucleus.
What are protons and neutrons?
400
Most of the elements are this type of element.
What is a metal?
400
Bigger than its original atom
What is an anion?
400
region is space where there is a high probability of finding electrons.
What is an orbital?
500
Came up with a model of the atom that resembled a solar system.
Who is Bohr?
500
In a neutral atom, equal in number to the protons.
What are electrons?
500
Outermost electrons in an atom.
What are valence electrons?
500
Smaller than its original atom
What is a cation?
500
Every element is made of tiny, unique particles called atoms that cannot be subdivided.
Atoms of the same element are exactly alike.
Atoms of different elements can join to form molecules.