Ca
Calcium
Chikamu 20 · 40.078 u
Calcium ndiyo inonyanya kuwanikwa metal mumuviri wemunhu, inodiwa kune mapfupa, teeth, uye cellular signaling.
Maitiro ekushandisa
| Atomic radius: | 40.078 u |
| Kuomarara | 1.55 g/cm³ |
| Kutonhora Point | 1115.0 K |
| Kutonhora Point | 1757.0 K |
| Kuoneka | Dull gray, silver mercury |
| State at Room Temp | _Kukanganisa: |
Chemical zvinhu
| Electronegativity | 1.0 (Pauling) |
| 1st Ionization Energy | 589.8 kJ/mol |
| Electronegativity: | 2.37 kJ/mol |
| Oxygen | +1, +2 |
Atomic Properties
| Kuisa Kugadzirisa | [Ar] 4s2 |
| Atomic radius: | 197.0 pm |
| Covalent Radius | 176.0 pm |
| Van der Waals radius | 231.0 pm |
Discovery
| Yakawanikwa ne | Humphry Davy |
| Kuonekwa kwegore | 1808 |
| _Panzvimbo: | London, England |
| Akapihwa zita mushure me | Latin 'calx' zvinoreva lime |
Nezve Calcium
Calcium is a soft, silvery-white alkaline earth metal and the fifth most abundant element in Earth's crust. It is essential for bones, teeth, and shells. Calcium ions serve as key signaling molecules in cellular processes.
Mashandisiro & Maapplication
Cement uye kongiri, girazi reParis, simbi yekuchenesa, antacids, zvinowedzera zvekudya, uye kubvisa mvura.
Nhoroondo yemitambo
Chirwere chekushaya calcium chinoitika kana munhu asiri kurarama nechikafu chinonakidza kana kusvibiswa nechikafu chinonakidza.
Isotopes
| Mamwe marudzi ezvinyorwa | Kuwanda | Half-Life | _Kuchengeta |
| 40 | 0.96941% | - | _Ndiani |
| 42 | 0.00647% | - | _Ndiani |
| 44 | 0.02086% | - | _Ndiani |
Kuisa Kugadzirisa
[Ar] 4s2