Period- The row of elements left to right which tell you the elements electrical charge.
Group- A group is a column on the table that tells you the valence electron of the element.
Elements are classified by their atomic number from left to right.
Valence Electrons- Electrons in the outer shell of an atom. It is found by looking at what group the atom is in.
Metals- Metals are found to the left of the metalloids/zig zag line.
Nonmetals- Everything to the right of the metalloids/zig zag line,
Metalloids- Metalloids are every element touching the zig zag line except for Aluminum and Polonium.
Atomic Number- The atomic number gives us the number of protons and electrons in the atom. It is also how the atoms are arranged(in number order).It can be found above the symbol.
Atomic Mass- Found by combining the number of protons and neutrons , it is found under the elements symbol.
You can find how reactive an atom is by seeing how close it is to the middle. The closer it is the middle the less reactive and vise versa.
Properties of Metals- Strong
Malleable and ductile
React with oxygen to form basic oxides
Sonorous
High melting and boiling points
Good conductors of electricity
Good conductors of heat
Mainly solids at room temp. Exception mercury - liquid at room temp.
Shiny when polished
When they form ions, the ions are positive
High density
Malleable and ductile
React with oxygen to form basic oxides
Sonorous
High melting and boiling points
Good conductors of electricity
Good conductors of heat
Mainly solids at room temp. Exception mercury - liquid at room temp.
Shiny when polished
When they form ions, the ions are positive
High density
- Properties of Nonmetals-
BrittleReact with oxygen to form acidic oxides
Dull sound when hit with hammer Low melting and boiling points Poor conductors of electricity and heat
Solids, liquids and gases at room temp. Dull lookingWhen they form ions, the ions are negative - except hydrogen that forms a positive ion, H+.Low density
Properties of Metalloids-Physical Properties of metalloidsCan be shiny or dull, Conductivity of heat and electricity better than nonmetals but not as good as metals. Solid at room temperature. Ductile, Malleable
Chemical Properties of MetalloidsTo the right of the stairstep, elements gain electrons when bonding. To the left of the stairstep, elements lose electrons when bonding
Chemical Properties of MetalloidsTo the right of the stairstep, elements gain electrons when bonding. To the left of the stairstep, elements lose electrons when bonding