adeiledd metelig Flashcards

1
Q

beth yw’r 3 enghreifft o adeiledd metelig?

A

Mg, Na, K (metelau)

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2
Q

beth yw priodweddau adeiledd metelig?

A
  • ymdoddbwynt uchel
  • berwbwynt uchel
  • dargludo trydan
  • hydrin
  • hydwyth
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3
Q

pam ydy adeiledd metelig gyda ymdoddbwynt / berwbwynt uchel?

A

bond cryf rhwng atomau (+) ac electronau (-)

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4
Q

pam ydy adeiledd metelig yn dargludo trydan?

A

mor o electronnau rhydd

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5
Q

pam ydy adeiledd metelig yn hydrin a hydwyth?

A

electronnau rhydd = caniatau atomau i llithro dros ei gilydd

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