Respuesta :

  • Symbol means to indicate a element with 2letters or 1 letter.
  • Valency means How much electrons can a element give or take determined by octet rule.

Ex:-

  • Calcium is indicated by Ca .
  • It has valency of 2.

they are blur

but hope you will under stand and pls pls markas brainliest ans

Ver imagen preetishrestha505
Ver imagen preetishrestha505