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Molecules & Ions

Several atoms in the following two figures exhibit one of the molecular geometries in Question 1. On your report sheet identify the molecular geometry about the atoms indicated.

Figure 2a, The Structure of Chlorophyll A

Chlorophyll a is one of the green pigments found in plants. Plants appear green because chlorophyll a absorbs red and purple light; the reflected light consequently appears green.

  1. Identify the geometrical figure formed by the nitrogen atoms bonded directly to the magnesium atom (green).
  2. Identify the geometrical figure formed by the carbon and magnesium atoms bonded directly to a nitrogen (blue) atom in chlorophyll
= Mg
= C
= O
= H
= N

Figure 2b, The Structure of Vitamin-B12

Vitamin-B12 is one of the essential vitamins required for living organisms.

  1. Identify the geometrical figure formed by the nitrogen and carbon atoms bonded directly to the cobalt atom (pink) in Vitamin-B12.
  2. Identify the geometrical figures formed by the oxygen atoms bonded directly to the phosphorus atom (orange) in Vitamin-B12.
= Co
= P
= C
= O
= H
= N
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