1Alkali Metals(1)
Lithium, Sodium, Potassium
2Halogens(7)
Fluorine, Chlorine, Bromine
3Element definition
An element is a substance that is made of only one type of atom.
4How are the elements arranged on the periodic table?
By atomic number(number of protons)
5What are the 3 sub-atomic particles
protons,neutrons and electrons
6Electron configuration for Chlorine
2,8,7
7Electrons are arranged in energy levels called _______
Electron shells
8The first electron shell, closest to the nucleus, has the _______ energy which is why it fills first.
lowest
9Isotopes definition
Isotopes of an element have the same number of protons (atomic number) but a different number of neutrons(mass number)
10Why isn't mas number of atom always a whole number
The mass number on the periodic table is the average of the naturally occuring isotopes of that element
11RAM formula example
(13x95.40)+(14x4.60)/100
12Ions definition
Ions are charged atoms
13When do Ions form
Ions form when an atom gains electrons to its valence shell or loses electrons from its valence shell.
14What do metal atoms form
Positive ions called cations
15What do Non-metal atoms form
Negative ions called anions
16Exception to Non-metals form anions
Hydrogen
17All anions end in ___
ide
18Aluminium and Gallium form a ___ ion
3+
19Ionic Compound definition
An ionic compound is a group of metal and non-metal ions bonded together by an electrostatic force of attraction between cations and anions.
21Phosphate symbol
PO4(3-)
22Carbonate symbol
CO3(2-)
24Reactants are written on the ____ side of the equation
left
25Products are written on the _____ side of the equation
right