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8 SCI 8-1 RC - Coggle Diagram
8 SCI 8-1 RC
Atoms Bond
atoms combine to form compounds
chemical bonds hold atoms together
Electron number and arrangement
electrons travel in
"rings"
it is impossible to know where exactly the electron is, but it is possible to understand which ring it is in.
different electron "ring" => different amounts of energy
closer => more energy
farther (from nucleus) => less energy
electrons can "hop off" and spin around another nucleus
nucleus's positive charge is what is keeping the electrons close
Valence Electrons
a
valence electron
is an outermost atom of an electron that participates in chemical bonding
more valence electrons => more possible bonds
Electron Dot Diagrams
Represents Valence Electrons as dots around the chemical symbol.
helps predict
which
elements will bond together
The Periodic Table
Has over 100 element blocks
Periods and Groups
groups are collumns
periods are rows
atomic number increases -> as you move across a period
each group has similar properties
Metals, Nonmetals, and Metalloids
left side is metals (aside from hydrogen)
strip of metalloids between metals and nonmetals
