Week Five

1. Inert (Noble) gas of the week : Helium

• Atomic number : 2
• Symbol : He
• Atomic mass : 4.0026
• Colorless, odorless, tasteless, non-toxic, inertmonatomic gas
• Boiling and melting points are the lowest among the elements
• exists only as a gas except in extreme conditions.
• Next to hydrogen , it is the second most abundant element in universe, and accounts for 24% of the elemental mass of our galaxy.

2. The colors in my own kitchen

Green - Broccoli , cabbage , celery

Blue - Blueberries

Red - Raspberries, Strawberries

Yellow - Lemons

Purple - Purple onions

Brown - Korean and Japanese Miso

White - Natural Vanilla Greek Yoghurt

3. Reading the " Colors of the minerals "

It was very interesting that to discover that to a novice observer color is not a good property but more of a confusion in identifying minerals !

Also, the fact that the atomic bond is the culprit of absorbing and emitting wavelengths and therefore making the mineral show the certain color it is.