Question

how are most elements found in nature?
a as pure elements because elements are mostly unreactive
b most elements are not found in nature.
c combined with other elements because elements are generally reactive
d as pure elements because elements are generally reactive

Explanation:

Most elements are reactive. So, in nature, they tend to combine with other elements to form compounds. For example, oxygen (O) combines with iron (Fe) to form iron oxide (rust, \(Fe_2O_3\)). Option a is wrong as most elements are reactive. Option b is incorrect because most elements are found in nature. Option d has a contradiction as reactive elements don't exist as pure elements easily.

Answer:

C. combined with other elements because elements are generally reactive