Calcium vs Combeite - What's the difference?
calcium | combeite |
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.
(mineral) A trigonal-trapezohedral colorless mineral containing calcium, oxygen, silicon, and sodium.
As nouns the difference between calcium and combeite
is that calcium is calcium while combeite is (mineral) a trigonal-trapezohedral colorless mineral containing calcium, oxygen, silicon, and sodium.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:
