Calcium vs Robertsite - What's the difference?
calcium | robertsite |
A chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks.
* {{quote-magazine, year=2013, month=September-October, author=
, magazine=(American Scientist), title= (countable) An atom of this element.
(mineralogy) A monoclinic-prismatic mineral containing calcium, hydrogen, manganese, oxygen, and phosphorus.
As nouns the difference between calcium and robertsite
is that calcium is calcium while robertsite is (mineralogy) a monoclinic-prismatic mineral containing calcium, hydrogen, manganese, oxygen, and phosphorus.calcium
English
Noun
(wikipedia calcium) (Symbol'': ''Ca )Katie L. Burke
In the News, passage=Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: