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Alcalinoterreu

Grupu 2
Periodu
2 4
Be
3 12
Mg
4 20
Ca
5 38
Sr
6 56
Ba
7 88
Ra

Les tierres alcalines o alcalinotérreos son los elementos del grupu 2 de la tabla periódica:

Códigu de colores usáu na tabla: Alcalinotérreos

El nome d'alcalinotérreos provién del nome que recibíen los sos óxidos, tierres, que tienen propiedaes básiques (alcalines). Poseen una electronegatividá ≤ 1,3 según la escala de Pauling.

Toos ellos tienen dos electrones na capa de valencia. Tienden a perder estos electrones pa formar cationes divalentes.

Son d'aspeutu arxentao, blandos y de baxa densidá. Reaicionen con halóxenos pa formar sales ióniques, y col agua pa formar hidróxidos básicos. En xeneral, son muncho menos reactivos que los metales alcalinos.


Elementos químicos
Llistaos
Nome | Símbolu | Númberu atómicu | Masa atómica | Puntu de fusión | Puntu d'ebullición | Densidá
Grupos
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18
Periodos
1 | 2 | 3 | 4 | 5 | 6 | 7
Series
Alcalinos | Alcalinotérreos | Lantánidos | Actínidos | Metales de transición | Metales del bloque p | Metaloides | Non metales | Halóxenos | Gases nobles
Bloques
bloque s | bloque p | bloque d | bloque f | bloque g


Referencies

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Enllaces esternos

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Alcalinoterreu
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