Elements, compounds and mixtures
All substances can be classified into one of these three types
Element
A substance made of atoms that all contain the same number of protons and cannot be split into anything simpler
There are 118 elements found in the Periodic Table
Compound
A pure substance made up of two or more elements chemically combined
There is an unlimited number of compounds
Compounds cannot be separated into their elements by physical means
E.g. copper(II) sulfate (CuSO4), calcium carbonate (CaCO3), carbon dioxide (CO2)
Mixture
A combination of two or more substances (elements and/or compounds) that are not chemically combined
Mixtures can be separated by physical methods such as filtration or evaporation
E.g. sand and water, oil and water, sulfur powder and iron filings
Answer, why does atoms bond in a compound, is it natural or a forced action?
Explain the origin of matter, which was the first ever atom, how was it formed and how it helped create other atoms.