HESI A2 Chemistry Updated for 2024-Graded A+
atom
basic building block of all molecules
protons
part of atom with a positive charge
electrons
part of atom with a negative electrical charge
neutrons
part of atom with no charge at all
ion
an atom that is electrically charged...
HESI A2 Chemistry Updated for 2024-Graded
A+
atom
basic building block of all molecules
protons
part of atom with a positive charge
electrons
part of atom with a negative electrical charge
neutrons
part of atom with no charge at all
ion
an atom that is electrically charged
cation
atom with a positive electrical charge
anion
atom with a negative electrical charge
periods
rows in the periodic table
groups
columns in the periodic table
Group IA
Group of Periodic table with a +1 charge. One electron in its outer shell. H Li Na K Rb Cs Fr
Group IIA
Group of Periodic table with a +2 charge. Two electrons in its outer shell Be Mg Ca Sr Ba Ra
Group IIIA
Group of Periodic table with a +3 charge. Three electrons in its outer shell B Al Ga In Ti Uut
Group IVA
Group of periodic table with either a +4 or a -4 charge. Four electrons in its outer shell C Si Ge Sn Pb
Uuq
Group VA
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