My alkali earth metal is Radium. Radium's chemical symbol is Ra and its atomic number is 88. According to some information I found on Wikipedia, Radium is highly radioactive. It is white, but oxidizes quickly after being exposed to air. It has a half life of 1602 years. It was discovered in 1898 by Marie Sklodowska-Curie and her husband Pierre.
Avogadro's Hypothesis
I got each of the questions on the quiz section correct. I thought it was an interesting article! It was interesting to see how these people came up with their hypotheses.
What is a mole?
The mole is a unit of measurement. According to the article, the mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilograms of carbon 12.
yes! very interesting how different people came up with their hypothesis, although the quiz wouldn't work for me!
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