| Pure Substance | Element or Compound? | Consists of: |
|---|---|---|
| Lead (Pb) | element | lead atoms |
| Oxygen gas (O2) | element | oxygen molecules* |
| Water (H2O) | compound | water molecules |
| Ammonia (NH3) | compound | ammonia molecules |
Why is oxygen considered an element?
- Look up definition of an element
- Look up definition of a molecule.
- Look up the definition of a compound.
Is oxygen a pure substance or a mixture?
Oxygen is an element, a pure substance. It exists in nature as a diatomic molecule, O2. The atmosphere in which we find oxygen is a homogeneous mixture containing oxygen, O2, nitrogen, N2, and argon plus many other gases is very small quantities. Oxygen itself is pure- it is an element, and not mixed with anything else.
Is oxygen a homogeneous mixture?
Yes there definitely is a difference between a homogeneous mixture of hydrogen and oxygen in a 21 mole ratio and a sample of water vapor. Flickr Creative Commons Images. Whereas in a sample of water vapor the hydrogen and oxygen are bonded with each. Saltwater is a homogeneous mixture or a solution.
What is an example of a compound with oxygen?
Oxide Definition and Examples
- Oxide Formation. Most elements form oxides. Noble gases can form oxides, but do so rarely. ...
- Nomenclature. A compound containing the oxide anion may simply be called an oxide. For example, CO and CO 2 are both carbon oxides.
- Structure. Metal oxides often form structures similar to polymers, where the oxide links three or six metal atoms together.
Is Blood A Compound or A Mixture?
Blood is a mixture, not a compound. Blood do consists of various types of atoms. Those atoms bond chemically to become a compound and those compound combine physically to form blood.
Why is Blood A Heterogeneous Mixture?
Blood is heterogeneous, not homogenous because it is actually not the same throughout.