How does an element differ from a compound?

Answer 1

An element is made of only one kind of atom and a compound is made of two or more kinds of atoms

A molecule is made of two or more atoms If those atoms are the same such as #H_2# or #N_2# The molecules is an element.

Some elements such as your metal elements use metallic bonding where an unlimited number of the same atoms can join. Iron, Aluminum are common examples.

If the atoms in the molecule are different it is a compound such as water #H_2O, # or Carbon dioxide #(CO_2)#

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Answer 2

Mateo Aguilar

An element is a pure substance composed of only one type of atom, whereas a compound is a substance composed of two or more different elements chemically bonded together in fixed proportions.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.