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Level 31

Modern Chem - Periodic Trends


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Noble gases
Elements in group 8A of the periodic table. Have no charge and are gases under normal conditions. (Helium, Neon, Argon, Krypton, Xenon, Radon)
alkali metals
Elements for which the 2nd ionization energy is MUCH higher than the first.
Na
Avogadro's constant = 6.02x10^23 particles per mol
F
the most electronegative element is
Group 16
group having a valence configuration of s2 p4
H
Hydrogen
n
amount of gas in moles
Kr
Krypton
Si
An element in the 3rd period considered a metalloid
metals
_______ are malleable and ductile
Chalcogen
The family usually having a valence of -2
Alkaline Earth
The name of the family with +2 ions
nonmetals
_______ 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
Halogen
The family with the highest + electron affinity
fluorine
1s2 2s2 2p5
Mendeleev
created periodic table which predicted properties of undiscovered elements, based on their mass # from trends in known elements
Mosley
He used X-rays to determine the number of protons in atoms
Ramsey
He discovered some noble gases
Transition Metals
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
lower
electrons that are closer to the nucleus have a _______ energy
Nitrogen Series
Family with 5 valence electrons
Horizontal
A period occupies a _______ position on the periodic table
Decreases
If the distance is increased between the objects then the gravity _______
Cation
(+) Lose an electron
Metalloids
...Elements that are on the "steps" of the periodic table with properties between metals & nonmetals
Ra
Radium
13
group having a valence of s2 p1
group
A column on the periodic table
group 15
group associated with gaining 3 e- to reach an octet
O
Bent Polar Molecule Example
Boron Family
The family with a significant increase in ionization energy between removal of the 3rd and 4th electrons
Halogens
Elements that become stable when they acquire 1 e-
energy levels
The possible energies that electrons can have in an atom.
Carbon Family
Which family becomes more metallic as atomic number increases?
Fr
Francium
p
momentum
Anion
(-) Gain an electron
two
number of groups to switch when showing an enantiomer
seven
The halogens have _______ valence electrons.
electron dot
notation that shows the number of valence electrons
valence
lewis dot structures show _______ electrons