DP Chemistry (last assessment 2024)

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Question 23M.1.SL.TZ1.11

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1.SL.TZ1.11
Level SL Paper 1 Time zone TZ1
Command term Question number 11 Adapted from N/A
11.
[Maximum mark: 1]
23M.1.SL.TZ1.11

Why does the melting point of the elements decrease down group 1?

A.  Atomic mass increases

B.  Number of electrons increases

C.  Radius of metal ion increases

D.  First ionization energy decreases

[1]

Markscheme

C

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