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Mass Number vs Atomic Number
MN = number of protons and Neutrons
AN = Number of protons
Atomic Weight/Molar Mass is given in _____ units and is equal to _____.
Atomic Mass units/AMU
A mole is _____ number and is equal to _____ in mass.
avagadros number 6.022e23
Characteristics of metals include:
Conduct heat + electricity
Lose electrons to form + ions
Electrons exist in sea of electrons
Characteristics of nonmetals include:
lower MP than metals
form covalent bonds with eachother
form (-) ions
What group are alkali metals, alkali earth metals, halogens, and Noble gases in?
Alkali metals = 1A
Alkaline Earth Metals = 2A
Halogens = 7A
Noble Gases = 8A
What type of ions do metals, nonmetals, and transition metals form?
Metals -> Cations
NM -> Anions
Transition metlas -> ions but lose from S orbital then d (looking to even out d)
Anion vs Cation vs Nuetral atom atomic radius
Anion = Much bigger (especially if added shell)
Cation = Much smaller (lose shell)
When compared to neutral atom
Shielding: electrons between nuclease and electron in question "block" some of nucleuses attraction (Z
Define Effective Nuclear Charge
) = amount of charge felt by electron in question after sheilding
= nuclear charge minus avg number of electrons between nucleus and electron in question
Def ionization energy + 1st IE vs 2nd IE etc.
: amount of energy required to detach an electron from a nuetral atom
: amount of energy to detach second electron (requires much more energy)
what are the 5 periodic trends and how are the trends oriented
increase left - right / bottom to top
energy of ionization
increase left - right / top to bottom