Webcompounds. Two elements made of carbon atoms that have very different properties: diamond and graphite. Two ways of combining carbon and oxygen to form gases with different properties:. One carbon atom combines with one oxygen atom to form carbon monoxide, one carbon atom combines with two oxygens forms carbon dioxide. R.S. … WebAn element was defined by the famous scientist Robert Boyle in 1661. The ancient Greeks thought there were four elements - fire, earth, air and water. Nowadays, we know that not a single one of those is actually an element. Fire is something burning, earth and air are mixtures and water is a compound.

A Review of Elements, Compounds, and Molecules

WebAn element is made from only one type of atom whereas a compound is made from different types of element chemically bonded together. Compounds can be broken … Web4.1.1.1 Atoms, elements and compounds. All substances are made of atoms. An atom is the smallest part of an element that can exist. Compounds are formed from elements by chemical reactions. … can tangent line touch more than one point

Atoms Elements Mixtures Compounds Revision Lesson

WebMay 10, 2013 · BBC Bitesize KS3 Elements, Compounds & Mixtures BBC18LS08. Lammas Science. 19.1K subscribers. Subscribe. 468. 179K views 9 years ago BBC Bitesize KS3 … Webatom The smallest part of an element that can exist. atomic number The number of protons in the nucleus of an atom. Also called the proton number. compound A substance formed by the chemical union of two or more elements. electron Subatomic particle, with a negative charge and a negligible mass relative to protons and neutrons. electronic structure WebWhich statement about atoms and molecule is correct? Elements always exist as separate atoms. Elements always exist as pairs of atoms called molecules. Elements and compounds can exist as molecules. 3 / 10. can tangrams overlap