Multiple choice general knowledge science & technology

As the atomic number of alkalis increases its boiling/melting point

  1. increases

  2. decreases

  3. remains stable

  4. is random
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As atomic number increases down Group 1, melting and boiling points DECREASE. This is because metallic bonding weakens as atomic size increases - larger atoms have lower charge density and weaker attraction to delocalized electrons.

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