Halogenai Flashcards

1
Q

Halogenai

A

VIIA grupes elementai.

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2
Q

Fizikines savybes

A

Nemetalai
Tirpus vandenyje
Fluoras(gelsvas) ir chloras (geltonai zalsvas) - dujos
Jodas(juida, violetine)- kietoji medz (kristalai)
Bromas- skystis (raudonai ruda)

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3
Q

Druskomis vadinama

A

Halogenai jungdamiesi su metalais ir sudarydami junginius

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4
Q

Paprastos druskos formule

A

Na + Cl -> NaCl (natrio chloridas)

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5
Q

Chloro savybe

A

Jungiasi beveik su visais metalais ir nemetalais

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6
Q

Chloro ir vandenilio saveika

A

Cl² (d) + H² (d) -> 2HCl (d)
Vandenilio chloridas
Druskos rugstis

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7
Q

Kaip susidaro drusku rugstis

A

Vandenilio chlorido dujos gerai tirpsta vandenyje

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8
Q

Jungiamosios reakcijos

A

Realcijos, kurioms vykstant kelios medz virsta viena

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9
Q

Halogenidai-

A

Sudaryti is halogenu ir kt. elemento (kovalentinio, joninio, metalinio)

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10
Q

NaBr Halogenidas

A

NaI+Br² –> NaBr+I²

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11
Q

Nuo ko priklauso halogenu aktyvumas

A

Ju atomu

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12
Q

Halogenu cheminis altyvumas

A

Dideja grupeje i virsu (priesingai nei sarminiai)
Fluoras - altyviausias, Jodas- nealtyviausias

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13
Q

Kiek e halogenai turi isoriniam sluoksnije

A

7

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14
Q

Halogenai (ivardink)

A

Fluoras
Chloras
Bromas
Jodas

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15
Q

Halogenu taikymas (jodas)

A

Medicina (dezinfekcine funkcija)

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16
Q

Fluiras naudojamas

A

Dedama i dantu pasta

17
Q

Chloras naudojamas

A

Plastikui gaminti
Geriamam, baseino vandeniui dezinfekuoti
Yra valikliuose