Garnets are double metal silicates.
compound
No, argon is not a compound. It is an element classified as a noble gas, existing in its atomic form.
Oxygen is the element. It's a compound because the oxygen bonds with another element to form an oxide.
Neither. It is an element. Also, by definition if a substance is pure it cannot be a mixture; it mus either be an element or a compound.
ammonia and chlorine to form ammonium chlorine, 8NH3 + 3Cl2 ---> 6NH4Cl + N2
When you mix an element with a compound, a chemical reaction may occur. The element may react with the compound to form a new compound or may remain unchanged depending on the reactivity of the elements involved.
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No, it is an element but as such can form compounds.
protons
compound
Calcium (Ca) is the element that may form a compound with CrO4 (chromate). The compound formed would be calcium chromate, CaCrO4.
Heat is not an element, compound, or mixture. It is a form of energy that can be transferred between objects.