Compusi moleculari Flashcards

1
Q

Cum incearca atomii de nemetal sa isi dobandeasca stabilitate?

A

Prin punere in comun de electroni

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2
Q

Ce se formeaza prin punere in comun de electroni?

A

Molecule.

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3
Q

Ce este molecula?

A

Cea mai mica particula a unei substante care pastreaza toate proprietatile substantei respective

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4
Q

Ce arata indicele?

A

Indicele este un numar care arata cati atomi de un anumit fel se gasesc intr-o molecula de substanta

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5
Q

Ce este valenta?

A

Capacitatea unui atom de a lega sau de a inlocui alti atomi in cursul reactiilor chimice

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6
Q

La scara atomica, valenta este egala cu?

A

a) numarul de electroni pe care un atom ii cedeaza sau ii primeste;
b) numarul de electroni pe care un atom il pune in comun cu un alt atom pentru a forma compusi moleculari.

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7
Q

Cu ce se noteaza valenta?

A

Cu cifre romane.

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8
Q

Ce valenta are intotdeauna Higrogenul?

A

Valenta 1

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9
Q

Ce valenta are intotdeauna Oxigenul?

A

Valenta 2

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10
Q

Ce valenta au elementele din grupa 1 si 2?

A

Au valenta egala cu nr. grupei

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11
Q

Ce valenta au elementele din grupa a 13-a?

A

Valenta 3

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12
Q

In compusi cu Hidrogenul, ce valenta au elementele din grupele 14, 15, 16, 17?

A

18-nr. grupei

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13
Q

In compusi cu Oxigenul, ce valenta maxima si minima au elementele din grupele 14, 15, 16, 17?

A

maxima: nr gr.-10
minima: nr. gr.-12

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