Famous People
Who discovered atoms?
Ernest Rutherford
What are atoms made up of?
Protons, neutrons and electrons
What are elements?
Elements are the building blocks of molecules.
What is a molecule made up of?
Who are alchemists?
Chemists from long ago who tried to turn iron into gold
What is inside the nucleus of an atom?
Protons and neutrons
Name 2 elements on the periodic table
May vary
Can humans see molecules using a microscope?
No
What is the charge on a proton?
Positive
How many elements are in the periodic table?
120
Democritus created the term atomos. What did he mean by this term?
Indivisible matter
What is the charge on an electron?
Negative
How many protons does oxygen have?
2
What elements are in an oxygen molecule?
Two atoms of oxygen
What experiment did a scientist do to prove atoms existed?
Ernest Rutherford did an experiment where he bounced tiny particles off of atoms, to prove atoms existed
What do you call it when an electron goes around the nucleus?
Shell or Orbit or Electron Cloud
How many protons does gold have?
79
What elements are in a water molecule?
hydrogen and oxygen