1. what did accident greek philosophers think were the four main elements?

are they really elements? explain?

2.what were their beliefs based on?

how do you think sciencetist today develop or base their scientific beliefs?

3.how many main element make up the earth

4. where do we get the name plumber? ( hint-it has latin roots )

5. explain why it might be bad to drink hot water pipes (like a shower ) in older homes?

6. where did the mad hatter get his name and what elements caused the madness to happen?

7. what element makes up gunpowder, th e heads on matches and makes rotting eggs smell bad ( when mixed with oxygen )

8. what was the paradox of the universal solvent?

9.how can 300 grams of gold weigh 32p grams

10. when, where, and what was the first element to be isolated?

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

If i had 2 m naoh solution, what does the 2 m stand for? 2 molar, but 2 of a solute in 1

For questions 1 and 2, consider the following experimental data.hydrogen emission lines were detected at the following wavelengths (in nm): 121.6102.697.395.093.8question 1use the electromagnetic radiation classifications below and figure 1-1 in the introductory information for this lab (in the lab manual) to determine the nf value for the experimental data provided? wavelength, ? (nm) 650 700 550 600 400 450 500 visible spectrum wavelength, ? (m) 11 10 3 10 10 10 8 10 5 10 10 -10 10 9 10 10 10 10 -12 10 microwave radio infrared x-ray ultraviolet gamma 1020 1019 1018 1 1016 015 1014 01 12 109108 frequency, v (hz)a.1b. 2c. 3d. 4e. 5question 2using the data for the emission line with the longest wavelength, the known value of nf (from question 1 in this prelab), and the value of ni (deduced from the ? and nf values) calculate the rydberg constant for hydrogen (rh) in units of m-1.a) 1.097 x 10-11 m-1b) 5.921 x 107 m-1c) 1.097 x 10-2 m-1d) 9.252 x 106 m-1e) 1.097 x 107 m-1