-came up with the word "atom"
-all atoms are small, hard particles that are "uncuttable" and always moving
-formed into different shapes and sizes
-ancient Greek philosopher
Who is Democritus
100
The rows that are horizontal
What is a period
100
The negatively charged particle on the outer part of the atom.
What is Electron
200
What is the Atomic Symbol for Gold
What is Au
200
Blood
What is a base
200
-conducted the gold foil experiment
-proved the existence of the nucleus
-most of the atom's mass is in the nucleus
Who is Ernest Rutherford
200
The rows that are vertical
What is a group
200
The neutrally charged particle in the nucleus of the atom
What is a neutron
300
What is the Atomic Number for Gold
What is 79
300
Pure Water
What is neutral
300
~Known for the "plum-pudding" model
~Electrons are small, negatively charged particles located throughout the positive material of the atom
Who is J.J. Thompson
300
The Atomic Symbol for Carbon
What is "C"
300
The positively charged particle in the nucleus of an atom
What is a proton
400
The elements from group two have __ Valence Electrons
What is 2
400
A substance that produces hydrogen ions in solution
What is an acid
400
All substances are made of atoms, which can't be created, divided or destroyed
Who is John Dalton
400
BCNO stands for this
What is boron, carbon, nitrogen, and oxygen
400
A Proton, Neutron, and Electron all make up________?
What is an atom
500
Are Alkali metals Reactive, Inert, or Highly Reactive
What is Highly Reactive
500
A substance that can remove water from materials
What is dehydrating agent
500
Electrons travel around nucleus in definite paths
Who is Neils Bohr
500
The two groups of elements that are excluded from the periodic table and below them