Question

Odd man out. Gold; silver; sodium;platinum

Answer 1

sodium...................................

Answer 2

Answer:

Sodium

Explanation:Among the given four elements Sodium, Gold, Silver, and Platinum, Sodium is the odd one out.

• Sodium is an alkali metal and belongs to the s block elements while Gold, Platinum and Silver are Transition metals and belongs to the d block.
• Sodium is a very reactive metal as has one electron in its valence shell while Gold, silver and platinum are noble metals and are the least reactive ones.
• Platinum is chemically inert.
• Gold silver and platinum have lustrous metals used for ornamental purposes.
• Gold silver and platinum are heavy metals.
• The atomic number of all four elements are:

1. Sodium-11
2. Silver-47
3. platinum - 78
4. Gold-79