1.1. Atomic structure Flashcards
Define element
A substance made of only one type of atom
Define compound
A substance made of two or more different atoms chemically bonded
Define mixture
Consists of two or more elements or compounds not chemically combined
State the three subatomic particles
Protons, neutrons, electrons
State the masses of the subatomic particles
Protons: 1, neutrons: 1, electrons: 0
State the relative charges of the subatomic particles
Protons: +1, neutrons: 0, electrons: -1
In what order were the subatomic particles discovered?
Electrons, then protons, then neutrons
What is the plum pudding model of the atom?
A ball of positive charge with negative electrons studded into it
What did the gold foil experiment prove?
That atoms have dense nuclei with a positive charge and that most of the atom is empty space
How do you calculate how many of each particle are in an element?
Protons = atomic number, Electrons = atomic number, Neutrons = mass number - atomic number
How many electrons can go in each shell?
1st = 2, 2nd = 8, 3rd = 8, 4th = 8
