Subatomic Particles Flashcards
(23 cards)
What is a compound ?
A substance made of two or more different atoms
How many electrons are in the first shell ?
How many electrons are in the second?
2
8
What are the relative masses for
Protons?
Neutrons?
Electrons?
1
1
0
What are the negative charges for :
Protons?
Neutrons?
Electrons?
+1
0
-1
What is a molecule?
More than one atom chemically bonded together
How are the particles arranged?
Protons and neutrons in nucleus, electrons orbit the nucleus in shells
How do you find the amount of neutrons?
Mass number- atomic number
What is an ion?
Atom which has lost or gained an electron
What is a displacement reaction?
When a more reactive metal takes place of a less reactive metal
How did mandeleev group the elements?
By there similar chemical properties
What does the period tell us?
How many shells an atom has
What was the plum pudding model?
A ball of positive charge with negative electrons studded too it
What was the gold foil model?
Atoms have dense nucleus with positive charge
What order are chemical reactions?
Left are reactants right are products
What is an isotope
Element with same number of protons but different number of neutrons, same atomic mass but different mass number
John Dalton did what?
Described atoms as solid spheres
JJ Thompson did what
The atom is a ball of charge with electrons scattered
Ernest Rutherford
Alpha scattering experiment
Neils Bohr
Electrons are in shells orbiting the nucleus
James Chadwick
Discovered there are neutrons in the nucleus
How is the modern periodic table arranged?
Elements are in order of atomic mass
Simple distillation
Separating a liquid from a solution
Fractional distillation
Separating out a mixture of liquids
