Science Test
Terms
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- atomic radius
- size of atom; same as math
- radii decreases
- atomic number increases
- Greater nuclear charge:
- pulls electrons closer and result in smaller radii
- ionization energy of an element
- amount of energy required to pull electrons away from atoms
- ionization energy
- increases with atomic #
- all electrons have___________
- ionization energies and depend on posistion of electron
- atomic radii decreases when_____
- down and across
- line across is what?
- periodic
- Line down shares________?
- valence electrons, sim. phys. and chem. properties
- electrons are attracted to the _____
- nucleus
- What happens with larger atoms?
- attracted to the nucleus but are rebounded off of one another
- what is the difference between both electrons
- inner shell or level electrons weaken the attraction between the nucleus and electrons; called inner shell shielding
- the nuclear charge sensed by the outer shell electron is always __________
- less than the actual charge of the nucleus
- the diminished nuclear charge is called__________
- effective nuclear charge
- inner shell shielding cause____
- effective nuclear charge
- as you go left to right one _____ valence electron is added on
- more
- P.T. corresponds to the ___
- valence level of electrons for that element
- metals
- left
- non metals
- right
- metalloids
- staircase (Al is metal)
- period corresponds to _____
- v.l.
- group #
- v.a.
- metls tend to
- lose electrons
- nonmetals
- share or take electron
- + oxidation
- # of metals
- - oxidation
- # of non metals
- larger atom______ionization energy
- less; b/c farther from nucleus and held less tightly
- atomic size ________ from____ to____
- decreases; left; right; b/c more protons and held more tightly
- the lower you go in a column what gets larger
- atomic size; b/c higher energy levels are filled
- Electronegativity
- has to do with the ability of an atom to attract electrons when its already bonded with another atom
- column 1
- alkali metals
- column 2
- alkaline metals
- energy levels
-
1-2
2-8
3-18
4-32 - v.e.
- last cicle of an atom wants 8
-
_ + or -
_ X
exp:
15 +3
7 N -
mass number;charge
atomic #
exp:
7 protons
8 neutrons (15-7)
4 electrons - 15
- nitrogen family
- 14
- carbon family
- 16
- oxygen family
- 17
- halogen family
- 18
- inert gases