Difference between revisions of "Potassium"
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: The most [[Stable Isotope|stable isotope]] of [[Potassium]] has 20 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 39. | : The most [[Stable Isotope|stable isotope]] of [[Potassium]] has 20 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 39. | ||
: An [[atom]] of [[Potassium]] has only 1 [[electron]] in its [[Outer Shell|outer shell]]. | : An [[atom]] of [[Potassium]] has only 1 [[electron]] in its [[Outer Shell|outer shell]]. | ||
− | : [[Potassium]] [[ion]]s have lost an [[electron]] to become [[Positive | + | : [[Potassium]] [[ion]]s have lost an [[electron]] to become [[Positive Charge|positively charged]]. |
====Properties==== | ====Properties==== | ||
: [[Potassium]] is a more [[Reactivity|reactive]] [[Alkali Metal|alkali metal]] than [[Sodium]] but less [[Reactivity|reactive]] than [[Rubidium]]. | : [[Potassium]] is a more [[Reactivity|reactive]] [[Alkali Metal|alkali metal]] than [[Sodium]] but less [[Reactivity|reactive]] than [[Rubidium]]. |
Revision as of 09:42, 3 April 2019
Contents
Key Stage 2
Meaning
Key Stage 3
Meaning
Potassium is a Group 1 element, on the Periodic Table, with an atomic number of 19.
About Potassium
Molecular Structure
- Potassium has the chemical symbol K.
- Potassium atoms join together in large numbers to form a giant metal molecule.
Atomic Structure
- Potassium has 19 protons and 20 neutrons in its nucleus giving it an Atomic Number of 19 and an atomic mass of 39.
- An atom of Potassium has only 1 electron in its outer shell.
Properties
- Potassium is a more reactive alkali metal than Sodium but less reactive than Rubidium.
- Potassium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Potassium oxidises quickly in the presence of Oxygen so it must be stored in oil.
- Potassium reacts strongly with water to produce Hydrogen gas and Potassium Hydroxide.
- Potassium is a solid at room temperature.
Key Stage 4
Meaning
Potassium is a Group 1 element, on the Periodic Table, with 19 protons in the nucleus.
About Potassium
Molecular Structure
- Potassium has the chemical symbol K.
- Potassium atoms join together in a giant metallic structure.
Atomic Structure
- The most stable isotope of Potassium has 20 neutrons in its nucleus giving it an atomic mass of 39.
- An atom of Potassium has only 1 electron in its outer shell.
- Potassium ions have lost an electron to become positively charged.
Properties
- Potassium is a more reactive alkali metal than Sodium but less reactive than Rubidium.
- Potassium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Potassium oxidises quickly in the presence of Oxygen so it must be stored in oil.
- Potassium reacts strongly with water to produce Hydrogen gas and Potassium Hydroxide.
- Potassium is a solid at standard temperature and pressure with a melting point of 63.5 °C.