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Science Review
Chemistry Review
Term | Definition |
---|---|
Proton - mass, charge, location | Mass= 1 amu Charge= positive Location= nucleus |
Neutron - mass, charge, location | Mass= 1 amu Charge= 0 Location= nucleus |
Electron- mass, charge, location | Mass= 0 amu Charge= negative Location= orbitals around the nucleus |
Atomic Number | Number on top of most periodic tables; number of protons in an atom |
Mass Number | Protons + Neutrons |
Isotope | Atom of the same element with different masses; atoms with the same number of protons but different number of neutrons |
In electron configuration of 5d4 what does each of the three values tell you? | 5= energy level d=block 4=location in block; number of electrons |
Valence Electrons | electrons in the outermost shell; maximum number is 8 |
Maximum number of valence electrons an atom can have | 8 |
Lewis dot diagram | diagram to represent the number of valence electrons |
Ion | charged atom |
two particles that determine the charge of an ion | protons and electrons |
anion | negatively charged ion |
cation | positively charged ion |
neutral atom | same number of protons and electrons |
oxidation number | charge of an atom; determined by the family/column on the periodic table |
the roman numeral in a transition metal | charge of the cation |
Synthesis | A + B- → AB |
Decomposition | AB → A + B |
Single Replacement | AB + C → CB- + A |
Double Replacement | AB + CD → AD + CB |
Combustion | produces CO2 + H2O; creates fire |
Mole | unit to count objects |
Alpha decay | emits a helium atom; mass decreases by 4; protons decrease by 2 |
Beta decay | emits an electron; mass stays the same; protons increase by 1 |
Gamma decay | emits a gamma ray; mass stays the same; protons stay the same |
Fission | when a nucleus splits |
Fusion | where two nuclei combine |
Electricity | flow of electrons |
Static electricity | electric charge that has accumulated in an object |