Difference between revisions of "Rubidium"
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: The most [[Stable Isotope|stable isotope]] of [[Rubidium]] has 48 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 85. | : The most [[Stable Isotope|stable isotope]] of [[Rubidium]] has 48 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 85. | ||
: An [[atom]] of [[Rubidium]] has only 1 [[electron]] in its [[Outer Shell|outer shell]]. | : An [[atom]] of [[Rubidium]] has only 1 [[electron]] in its [[Outer Shell|outer shell]]. | ||
| − | : [[Rubidium]] [[ion]]s have lost an [[electron]] to become [[Positive | + | : [[Rubidium]] [[ion]]s have lost an [[electron]] to become [[Positive Charge|positively charged]]. |
====Properties==== | ====Properties==== | ||
: [[Rubidium]] is a more [[Reactivity|reactive]] [[Alkali Metal|alkali metal]] than [[Potassium]] but less [[Reactivity|reactive]] than [[Caesium]]. | : [[Rubidium]] is a more [[Reactivity|reactive]] [[Alkali Metal|alkali metal]] than [[Potassium]] but less [[Reactivity|reactive]] than [[Caesium]]. | ||
Revision as of 09:44, 3 April 2019
Contents
Key Stage 2
Meaning
Key Stage 3
Meaning
Rubidium is a Group 1 element, on the Periodic Table, with an atomic number of 37.
About Rubidium
Molecular Structure
- Rubidium has the chemical symbol Rb.
- Rubidium atoms join together in large numbers to form a giant metal molecule.
Atomic Structure
- Rubidium has 37 protons and 48 neutrons in its nucleus giving it an Atomic Number of 37 and an atomic mass of 85.
- An atom of Rubidium has only 1 electron in its outer shell.
Properties
- Rubidium is a more reactive alkali metal than Potassium but less reactive than Caesium.
- Rubidium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Rubidium oxidises extremely quickly in the presence of Oxygen so it must be stored in a completely sealed container.
- Rubidium reacts explosively with water to produce Hydrogen gas and Rubidium Hydroxide.
- Rubidium is a solid at room temperature.
Key Stage 4
Meaning
Rubidium is a Group 1 element, on the Periodic Table, with 37 protons in the nucleus.
About Rubidium
Molecular Structure
- Rubidium has the chemical symbol Rb.
- Rubidium atoms join together in a giant metallic structure.
Atomic Structure
- The most stable isotope of Rubidium has 48 neutrons in its nucleus giving it an atomic mass of 85.
- An atom of Rubidium has only 1 electron in its outer shell.
- Rubidium ions have lost an electron to become positively charged.
Properties
- Rubidium is a more reactive alkali metal than Potassium but less reactive than Caesium.
- Rubidium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Rubidium oxidises extremely quickly in the presence of Oxygen so it must be stored in a completely sealed container.
- Rubidium reacts explosively with water to produce Hydrogen gas and Rubidium Hydroxide.
- Rubidium is a solid at standard temperature and pressure with a melting point of 39.3 °C.