more quiz help please.

[elderly]

1. Heaviest naturally occuring element is??

2. What was first constructed at Artois?

3. It smells like rotten eggs (chemical compound)

4. what type of plant is 'greenhood'

All help greatfully received.

[shaneystar]

I think Greenhood is an orchid.
The compound could be Sulphur.
Element ......Uranium?
Artois ....A brewery?

[JackDanielsU]

3. Hydrogen Sulphide

[Clanad]

1. Uranium

3. Hydrogen sulfide

4. Orchid

[double-blade]

No 2

could be the artesian well,it was named after artois

[MONTY2K5]

Rotten eggs Sulphur

[smouse]

sulphur isnt a compound go with the hydrogen sulphide

[sddsddean]

Definately Hydrogen Sulphide as I found out on a 'Safety in Sewers' course (what an exciting life I lead!). You can smell it at 4 parts per million(ppm) and is fatal at 8 ppm. Unfortunately, at 6ppm, it anaethetises the nerves in your nose, so you think it has 'gone away'!!