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Nitrogen or phosphorus

Exercise and reference answers

Items
  1. Item
    78 per cent of air
    Category
    Nitrogen
  2. Item
    Chile saltpetre
    Category
    Nitrogen
  3. Item
    Found in proteins
    Category
    Nitrogen
  4. Item
    Apatite minerals
    Category
    Phosphorus
  5. Item
    Present in bones
    Category
    Phosphorus
  6. Item
    Milk and eggs
    Category
    Phosphorus
Categories
  1. Item
    Nitrogen
  2. Item
    Phosphorus
Instructions
Tap each fact into the element it belongs to.

Explanation

_Source: syllabus Chemistry, Chapter 7, The p-Block Elements._
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