Sarminiai Metalai Flashcards

1
Q

Kas yra sarminiai metalai

A

1A grupes elementai.
Matalai, kuriems reaguojant su vandeniu susidaro sarmas.

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2
Q

Fizikines savybes

A

1.Mazas tankis
2. Lydimosi temp. zemesne negu kt. metalu
3. Praleidzia elektros srove
4. Blizgus viduje
5. Sarminiu metalu tankiui didejant lydimosi ir virimo temp. mazeja
6. Minksti

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3
Q

Indikatorius-

A

Medz., kurios sarminiuise tirpaluose keicia spalva

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4
Q

Kokie yra sarminiai metalai (ivardink)

A

Litis
Natris
Kalis
Rubidis
Cezis
Francis

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5
Q

Natrio saveika su vandeniu

A

Natris + vanduo -> natrio sarmas + vandenilis

2Na(k)+2H²O(s) –> 2NaOH(aq)+H²(d)

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6
Q

Sarminiu metalu saveika su deguonimi
Na ir O
Li ir O

A

2Na + O² –> Na²O²
Natris + deguonis –> natrio peroksodas
4Li(k)+O² –> 2Li²O
Litis + deguonis –> licio oksidas

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7
Q

Sarminiu metalu saveika su vandeniu (visumoj)

A

Audringai raguoja, gaunasi sarmas (vandenilis ir metalo hidroksodas)

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8
Q

Sarminiu metalu cheminis altyvumas

A

Dideja grupeje is virsau i apacia.
Cezis - aktyviausias
Litis - nealtyviausias

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9
Q

Natrio taikymas

A

Fotoelementuose
Valgomojoje druskoje
Stiklo gamyboje
Dantu pastoje

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10
Q

Kalis naudojamas

A

Sprogmenims, fejerverkams
Tresiami augalai

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11
Q

Litis naudojamas

A

Kosminiuose, povandeniniuose laivuose
Dezinfekavimo priemonese
Gaminant stikla, keramika

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12
Q

Rubidis naudojamas

A

Teliniu bateriju gamyboje
Elektronikos priemonese
Lazeriu technikoje

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13
Q

Cezis naudojamas

A

Atominiuose laikrodziuose
Elektronikos pramonej
Medicinoj (ribotai)

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14
Q

Francis naudojamas

A

Cheminiuose ir fizikiniuose tyrimuose

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