Difference between revisions of "Atom"

Revision as of 09:02, 23 September 2018

An atom is a very small particle made of protons, neutrons and electrons that can join with other atoms to make molecules.

In The Dalton Model atoms are shown as ball shaped particles. This makes it easier to draw diagrams of molecules.

Atoms are made of three smaller particles; the proton, neutron and electron.

Protons and neutrons are found in the nucleus at the centre of an atom. Electrons are found orbiting the nucleus in 'shells'.

In an atom the number of protons is always the same as the number of electrons.

Different atoms can have different numbers of protons and neutrons.

The simplest atom is Hydrogen which has 1 proton and 1 electron and no neutrons.

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-A very small particle that can join with others to make [[molecule|molecules]].
+==Key Stage 3==
+===Meaning===
+An [[atom]] is a very small [[particle]] made of [[proton]]s, [[neutron]]s and [[electron]]s that can join with other [[atom]]s to make [[molecule|molecules]].
+===About Atoms in The Dalton Model===
+: In [[The Dalton Model]] [[atom]]s are shown as [[sphere|ball]] shaped [[particle]]s. This makes it easier to draw [[diagram]]s of [[molecule]]s.
+===About Atoms beyond The Dalton Model===
+: [[Atom]]s are made of three smaller [[particle]]s; the [[proton]], [[neutron]] and [[electron]].
+: [[Proton]]s and [[neutron]]s are found in the [[nucleus]] at the centre of an [[atom]]. [[Electron]]s are found [[orbiting]] the [[nucleus]] in 'shells'.
+: In an [[atom]] the number of [[proton]]s is always the same as the number of [[electron]]s.
+: Different [[atom]]s can have different numbers of [[proton]]s and [[neutron]]s.
+: The simplest [[atom]] is [[Hydrogen]] which has 1 [[proton]] and 1 [[electron]] and no [[neutron]]s.