19,879
edits
Changes
Atom
,no edit summary
| style="height:20px; width:200px; text-align:center;" |[[Lithium]] always has 3 [[proton]]s but in this case has 3 [[neutron]]s.
|}
===Properties of the Subatomic Particles===
: The [[particle]]s that make an [[atom]] all have slightly different properties. Since the particles are so small their [[mass]] and [[charge]] are extremely small numbers so, to make it easier, they are represented as 'relative' [[mass]] and 'relative' [[charge]] compared to a [[proton]].
{| class="wikitable"
|-
|[[File:SubatomicParticleProperties.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |A table showing the [[Relative Atomic Mass|relative mass]] and [[Relative Atomic Charge|relative charge]] of the [[proton]], [[neutron]] and [[electron]].
|}
===History of Atoms===
: The existence and structure of [[atom]]s was not always known.