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Learn about elements, compounds and mixtures in this KS3 Chemistry guide from BBC Bitesize. Atoms and molecules. Atoms are the building blocks of everything. Atoms can form strong bonds with each...
With atoms and elements all cleared up, it’s important to understand the difference between a molecule and an element. Because like all things in the world, elements and molecules are both made of atoms. You know elements are all the different types of atoms on the periodic table.
Atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.
Scientists distinguish between different elements by counting the number of protons in the nucleus. Since an atom of one element can be distinguished from an atom of another element by the number of protons in its nucleus, scientists are always interested in this number, and how this number differs between different elements. The number of ...
Give a chemical definition of element, and comment on the distinction between the terms atom and element. You should know the names and symbols of the more common elements, including those whose symbols are derived from their Latin names.
Chemical reactions like this make sense if the elements exist as simple building blocks: atoms, in other words. If we can't see atoms, how do we know they're there? That's a very good question!
Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.
When atoms of two or more elements bond together, they make a compound. These clusters of strongly bonded atoms are called molecules. See how they're represented by two circles of different...
Key learning points. Atoms of every element consist of the same three subatomic particles. All elements consist of their own atoms, with a unique number of protons defining the element. Everything around us is made of different combinations of atoms, either on their own, or in compound form.
A particular element is composed of only one type of atom. Atoms are further composed of subatomic particles called electrons, protons and neutrons. Elements can combine with each other to form molecules via chemical reaction.
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