Identitfy the Element?

Question

Combined with chlroine, it produces a compound essential to life (I was thinking Sodium?)

A metal that occurs in vast limestone deposits and combines with oxygen to form an oxide with a formula MO.

The transition element at the center of hemoglobin

Used in smoke detectors and named for the United States

A component of washing powder mined in Death Valley

The basis for the compounds that make up all living thins

Primary constituent of pencil lead

The last element in the Periodic Table that is not radioactive

Exists as X4 molecules

The element named after the sun, where it was first detected


Thanks for the help guys.

Imagine yourself living in the time of John Dalton. You have an unknown element that combines with sulfur to produce two different compounds. One of the compounds contains 47.50% sulfur by mass and the second compound contains 31.51% sulfur mass. What atomic mass would you assign to the uknown element?

Answer 1

1) Yep, Sodium
2) Calcium
3) Iron
4) Americium
5) Boron
6) Carbon (organic molecules)
7) Carbon (as graphite, mixed with clay) (NOT Lead!!!)
8) Bismuth
9) Phosphorus
10) Helium

Answer 2

Na

Ca

Fe

Americum?

c?, N?, H?, O?

C

-

-

He