Subatomic Particles Flashcards
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
