Kristali Flashcards

1
Q

Kaj so kristali?

A

So trdne snovi, ki imajo urejeno notranjo zgradbo

ravne ploskve,ostri robovi

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2
Q

Kakšne osnovne celice poznamo?

A
Primitivne(8 oglj. gradnikov - 8x1/8=1),
telesno centrirane(8 oglj.+1 sred,- 8x1/8+1=2),
ploskovno centrirane(8 oglj.+3 sred.-8x1/8+6x1/2=4)
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3
Q

Kaj je osnovna celica?

A

Je najmanjsi del kristalne mreze ki se ponavlja v vseh smereh

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4
Q

Kaksne kristale poznamo?

A

Ionski
Kovalentni
Kovinski
Molekulski

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5
Q

Kaksni so ionski kristali?

A
ioni so osnovni delci, 
el. so prevodni v talini in raztopini,
tališče je visoko-ker so vezi močne,
in so drobljivi.
Primer:NaCl
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6
Q

Kaksni so kovalentni kristali?

A
atomi nekovin so osnovni delci,
el. so neprevodni,
tališče je visoko,
in so trdi.
Primer:diamant
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7
Q

Kaksni so kovinski kristali?

A
atomi kovin so osnovni delci,
el. so prevodni v trdnem stanju in talini,
tališče je raznoliko,
so kovni in se ne drobijo
Primer:Fe
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8
Q

Kaksni so molekulski kristali?

A
molekule so osnovni delci,
el. so neprevodni,
tališče je nizko,
so drobljivi.
Primer: C6H12O6
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9
Q

Kaj je kristalna mreža?

A

Je urejena ponavlajoča se razporeditev gradnikov snovi v prostoru.

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