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Elements in group 8A of the periodic table. Have no charge and are gases under normal conditions. (Helium, Neon, Argon, Krypton, Xenon, Radon)
Elements for which the 2nd ionization energy is MUCH higher than the first.
Avogadro's constant = 6.02x10^23 particles per mol
the most electronegative element is
group having a valence configuration of s2 p4
amount of gas in moles
An element in the 3rd period considered a metalloid
_______ are malleable and ductile
The family usually having a valence of -2
The name of the family with +2 ions
_______ lie on the right of the periodic table and do not conduct electricity.
Actinide and Lanthanide
Names given to elements filling the f orbital are the _______ and the _______ series
The family with the highest + electron affinity
1s2 2s2 2p5
created periodic table which predicted properties of undiscovered elements, based on their mass # from trends in known elements
He used X-rays to determine the number of protons in atoms
He discovered some noble gases
Any element in a "B" group (#3-12) on the periodic table
Alkaline Earth Metals
The family showing a significant increase in ionization energy between the removal of the 2nd and 3rd electrons
electrons that are closer to the nucleus have a _______ energy
Family with 5 valence electrons
A period occupies a _______ position on the periodic table
If the distance is increased between the objects then the gravity _______
(+) Lose an electron
...Elements that are on the "steps" of the periodic table with properties between metals & nonmetals
group having a valence of s2 p1
A column on the periodic table
group associated with gaining 3 e- to reach an octet
Bent Polar Molecule Example
The family with a significant increase in ionization energy between removal of the 3rd and 4th electrons
Elements that become stable when they acquire 1 e-
The possible energies that electrons can have in an atom.
Which family becomes more metallic as atomic number increases?
(-) Gain an electron
number of groups to switch when showing an enantiomer
The halogens have _______ valence electrons.
notation that shows the number of valence electrons
lewis dot structures show _______ electrons