History of atomic theory
Was the first to suggest we are made up of small structures called atoms.
Democritus
The electrons have this charge.
What is negative?
2, 8, 8, 1
What is Potassium?
The atomic number is the same as the number of
What is protons?
His model was called the Plum Pudding Model
What is Thomson?
He said atoms of same element are same and different elements are different and that atoms are NOT divisible.
Dalton
The protons have this charge.
What is positive?
Total number of protons in a neutral atom
Number of electrons is usually same as this number
What is atomic number or protons?
His model is called the billiard ball?
What is Dalton?
He was the one to discover electrons
Who is Thomson?
The neutrons have this charge
What is neutral?
True or False: Grade 8 elements have a full valence shell.
True
The sum of number of neutrons and number of protons make up this number
What is mass number (weight)?
He came up with his theory after experimenting with Gold foil. His model looks like the Jimmy Neutron symbol.
Who is Rutherford?
This scientist proposed electrons are energetic.
Who is Bohr?
This subatomic particle is the same as the number of protons.
What is electron?
Symbol Mg2+.
The electronic configuration is...
2, 8
True or false Atomic Number is a unique property of each element
What is True?
His model is named after him.
Who is Bohr?
His experiments led to discovery that all atoms had nuclei.
What is Rutherford?
The mass of the atom is determined by this
What is nucleus or number of neutrons and protons?
The number of electrons is more than the number of protons.
What is Anion?
True or False Mass number is determined by the atomic number only
What is False?
The elctrons are arranged in
What are shells/ orbits/ energy levels?