Potassium.
Potassium
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Atomic number: 19
Symbol: K
Period: 4
Group: 1
Protons: 19-Neutrons: 22-Electrons: 19
Boiling Point: 774 º C
Structure: Cubic
Isotopes: 3
Shells: 4
Atomic mass: 39.0983 g.mol –
It’s a metal
Density: 0.86 g/cc
State of matter: Solid
crystalline structure: The use of Potassium Oxide
Combustible: Yes
Two different Isotopes: 39K & 41K
Physical Properties & Description
• *Potassium is a pure silvery-white form, it
has a dull sheen and it is very soft.
Although it very reactive with air and
Water.
• melting point is 63.25°C, boiling point is
760°C, specific gravity is 0.862 (20°C)
• It’s very easy to cut with a knife.
• Potassium and its salts will color flames
violet.
Reactive Elements
• *Potassium is explosive to Water, Oxygen
and moisture from Air.
• *Potassium is stronger than Zinc, so if
Potassium is heated with Zinc chloride, it
reacts to give Potassium chloride and Zinc
Commonly Identified Molecules
• Commonly identified molecules: Valinomycin it
complexes with Potassium Tertraphenylborate:
A potassium compound
• KcsA potassium channel
• High protein of specificity for potassium
• 40K, 41K & 39K-they’re reactive isotopes, it
decays from argon-40 and calcium-40. They’re
trapped inside minerals. The isotopes keep
potassium tightly in minerals. Chemical formChloride. Mass for 40K: 39.9639992. Mass for
41K: 40.9618254. Mass for 39K: 38.9637074.
History of Potassium
-Who discovered Potassium? Humphrey
Davy
-When was it discovered? October 6, 1807
• Where was it discovered? Molten potash
• What are its uses? It is responsible for the
function of cells, and it reduces blood
pressure.
Potassium Isotopes
• Potassium -40: Is very radioactive, it was
discovered in Potash, it uses Gas and
Soap.
• Potassium -41: Is a stable isotope
• Potassium -39: Is a stable isotope
Nucleus
Shell 1.
Shell 2.
Shell 4.
Shell 3.
Neon
Neon
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Atomic Number: 10
Symbol: Ne
Atomic Mass: 20.18
Shells: 2,8
Melting Point: 24.53 K
Period: 2
Group: VII
Protons:10-Neutrons: 12-Electrons: 10
Boiling Point: 246.048 º C
Melting Point: 248.67 º C
Structure: Cubic
Density: 0.9002 g/L
Is it Combustible? Yes
Two different Isotopes: 20NE, NE21
State of Matter: Gas
Properties of Neon & Description
• Neon is one of the lights of noble gasses, it is a
colourless substance, it has the narrowest liquid
range out of all the elements.
• Neon has 3 stable isotopes, it is the fourth most
abundant in the universe and it is a colourless
element.
• Atomic Mass Average: 20.1797
• Boiling Point: 27.246K -245.904°C -410.6°F
History of Neon
• Who discovered it? William Ramsey &
Morris W.
• When was it discovered? 1898
• Where was it discovered? London
• What are its uses? To make high-voltage
indicators, lightning arrestors, neon are
used in making gas lasers.
Reactive Elements
• Neon doesn’t react with other Elements
because it is a noble gas, and noble
gasses don’t particularly do anything, this
is the same for Helium.
Commonly identified Molecules
• Neon is an inert gas and it doesn’t
normally bond with any other molecules.
• So it doesn’t have any relating to it.
Isotopes
• 20NE-Stable %Abundance=90.48 3
• 21NE-Stable %Abundance=0.27 1
• 22Ne-Stable %Abundance=9.25 3
Nucleus
Shell 1
Shell 2