This is the smallest known building block to matter.
What is the atom?
100
This Greek man said that all atoms are small hard particles.
Who is Democritus?
100
The first energy level can hold this many electrons.
What is 2?
100
These two types of small particles can be located in the nucleus of an atom.
What are protons and neutrons?
100
When looking at an element on the Periodic Table, this represents the neutrons and protons in the atom.
What is the atomic number?
200
This subatomic particle in the atom has a positive charge.
What is the proton?
200
This English scientist said that atoms join with other atoms to make new substances.
Who is Dalton?
200
The 2nd level in the elctron cloud can hold this many electrons.
What is 8.
200
These small subatomic particles can be found orbiting the nucleus.
What are electrons?
200
The number that includes botht the mass of the protons and neutrons is called this.
What is the atmoic mass number?
300
This part of the atom has a negative charge.
What is the electron?
300
This scientist from New Zealand said that electrons travel around the nucleus.
Who is Rutherford?
300
These two subatomic particles can not be found in the energy levels of an electron cloud.
What are protons and neutrons?
300
These subatomic particals have no charge.
What are neutrons?
300
In APE MAN, this is the formula to find the amount of neutrons in an atom.
What is atomic mass number - atomic number?
400
The valence electrons are responsible for this type of bonding.
What is chemical bonding?
400
This Danish scientist discorvered energy levels.
Who is Niels Bohr?
400
This is the formula to figure out how many electrons can fit into each particular energy level.
What is 2(n)2?
400
These subatomic particles have a negative charge and are not considered in the atom's mass.
What are electrons?
400
The nucleus of an atomic is held together by this.
What is a strong nuclear force?
500
Neils Bohr's atomic model was often called this and the 'Bohr Model' because of the way it looked.
What is the 'Planetary Model'?
500
This German physicist discovered that the equation for energy that equals mass times the speed of light, which lead to the discovery of nuclear energy by using atoms.
Who is Einstein?
500
These are located in the outermost energy level and are the electrons involved in bonding.
What are valence electrons?
500
This area encirlces the nucleus where electrons are likely to be found.
What is the electron cloud?
500
Each element is composed of one type of these and cannot be broken down into simpler substances.