C2 Flashcards
What is an atom?
The smallest piece of an element
What is a element?
A substance where all the atoms have the same atomic number
What is a isotope?
Atoms with the same number of protons but different number of neutrons
What is a molecule?
Two or more atoms bonded together
What is a compound?
Two or more DIFFERENT atoms bonded together
What is the relative charge and mass of a proton?
The relative mass is 1 and the relative charge is +1
What is the relative charge and mass of a neutron?
The relative mass of a neutron is 1 and the relative charge is 0
What is the relative charge and mass of a electron?
The relative mass of a electron is 0 and the relative charge is -1
Who discovered the atom and what model was used to describe it?
It was discovered by John Dalton and solid spheres was the model
Who discovered the electron and what model was used to describe it?
JJ Thompson discovered the electron and the model was a plum pudding
Who discovered the nucleus?
Rutherford discovered the nucleus
Who discovered the neutron?
The neutron was discovered by James Chadwick
Who discovered the shells around the nucleus?
Niels Bohr
