Fendy Lormine
Chemistry 1
6-13-13
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Chemists didn’t know that
Potassium and sodium
were different until the
18th century. That’s
because they didn’t
realize that vegetable
alkali from potassium
came from deposit earth,
whereas mineral alkali
from sodium came from
wood ashes.
Potassium was the first
metal isolated by
electrolysis.
Potassium is never found
free in nature, but is
obtained by electrolysis
of the chloride or
hydroxide.
Oranges contains lots of
potassium, they are good
for the body.
 Potassium
is an element from the
periodic table discovered by Sir
Humphrey Davy in 1807 in England.
 The atomic symbol for Potassium is (K).
 It’s Atomic number is 19.
 It’s color silver white.
 It’s Atomic Name is Potassium.
 It’s an Alkali metal so it is classified in the
metal group.
 Potassium
only has two stable Isotopes, K-39
and K-41, K-40 is a radioisotope of
Potassium.
 K-40 is often also regarded as a stable
isotope
 K-40 and K-41, are used to study the impact
of potassium on the growth of plants and of
the human cardiovascular system.
 Other temporary Isotopes of Potassium are
K-42 and K-43
 39K (93.6%), 40K (0.01%), and 41K (6.7%).
 Potassium
is part of group one because it’s
an alkali metal and it’s one of the most
energetic elements in the periodic table.
 Atomic Mass: 39.0983 amu
Melting Point: 63.65 °C (336.8 K, 146.57 °F)
Boiling Point: 774.0 °C (1047.15 K, 1425.2 °F)
Number of Protons/Electrons: 19
Number of Neutrons: 20
 Period in the periodic table: 4
 Atomic Radius of potassium is 235 Pm
 The electron configuration for potassium
is: K 1s2 2s2 2p6 3s2 3p6 4s1
 Ionization
is any process by which a neutral
atom or molecule gains or loses electrons
when combined with a another atom.
 Potassium is most likely to form a positively
charged ion with an energy of 1+, because it
looses an electron.
 The first ionization energy of potassium is
418.8 kJ mol-1
Electronegativity is a measure of the
tendency of an atom to attract a bonding
pair of electrons. Or the ability of an atom
to attract another in a chemical bound.
 The electronegativity of potassium
according to Pauling is,0.8.

http://www.webelements.com/potassium/history.html
http://www.webelements.com/potassium/
http://www.webelements.com/potassium/isotopes.ht
ml
http://chemistry.about.com/od/elementfacts/a/potassi
um.htm
http://www.chem.latech.edu/~deddy/Lectnote/Chap7
B.html
http://www.webelements.com/potassium/atoms.html
http://www.chemguide.co.uk/atoms/bonding/electron
eg.html
http://www.lenntech.com/periodic/elements/k.htm
http://www.chemicalelements.com/elements/k.html