Difference between revisions of "Calcium"
| Line 29: | Line 29: | ||
: The most [[Stable Isotope|stable isotope]] of [[Calcium]] has 20 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 40. | : The most [[Stable Isotope|stable isotope]] of [[Calcium]] has 20 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 40. | ||
: An [[atom]] of [[Calcium]] has only 2 [[electron]]s in its [[Outer Shell|outer shell]]. | : An [[atom]] of [[Calcium]] has only 2 [[electron]]s in its [[Outer Shell|outer shell]]. | ||
| − | : [[Calcium]] [[ion]]s have lost two [[electron]]s to become [[Positive | + | : [[Calcium]] [[ion]]s have lost two [[electron]]s to become [[Positive Charge|positively charged]]. |
====Properties==== | ====Properties==== | ||
: [[Calcium]] is a more [[Reactivity|reactive]] [[Alkali Earth Metal|alkali earth metal]] than [[Magnesium]] but less [[Reactivity|reactive]] than [[Strontium]]. | : [[Calcium]] is a more [[Reactivity|reactive]] [[Alkali Earth Metal|alkali earth metal]] than [[Magnesium]] but less [[Reactivity|reactive]] than [[Strontium]]. | ||
Revision as of 09:42, 3 April 2019
Contents
Key Stage 2
Meaning
Calcium is a metal found in our bones.
Key Stage 3
Meaning
Calcium is a Group 2 element, on the Periodic Table, with an atomic number of 20.
About Calcium
Molecular Structure
- Calcium has the chemical Symbol Ca.
- Calcium atoms join together in large numbers to form a giant metal molecule.
Atomic Structure
- Calcium as 20 protons and 20 neutrons in its nucleus giving it an Atomic Number of 20 and an atomic mass of 40.
- An atom of Calcium has only 2 electrons in its outer shell.
Properties
- Calcium is a more reactive alkali earth metal than Magnesium but less reactive than Strontium.
- Calcium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Calcium reacts strongly with water to produce Hydrogen gas and Calcium Hydroxide and strongly with acid to produce Calcium salts.
- Calcium is a solid at room temperature.
Key Stage 4
Meaning
Calcium is a Group 2 element, on the Periodic Table, with 20 protons in the nucleus.
About Calcium
Molecular Structure
- Calcium has the chemical symbol Ca.
- Calcium atoms join together in a giant metallic structure.
Atomic Structure
- The most stable isotope of Calcium has 20 neutrons in its nucleus giving it an atomic mass of 40.
- An atom of Calcium has only 2 electrons in its outer shell.
- Calcium ions have lost two electrons to become positively charged.
Properties
- Calcium is a more reactive alkali earth metal than Magnesium but less reactive than Strontium.
- Calcium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Calcium reacts strongly with water to produce Hydrogen gas and Calcium Hydroxide and strongly with acid to produce Calcium salts.
- Calcium is a solid at standard temperature and pressure.