E.OY Revision [2023]
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What is an isotope?
Atoms of the same element, with different mumbers of neutrons
What is the relative mass of a proton?
1
What is the relative mass of electrons?
0/very small
What is the relative mass of protons?
1
What is the charge of an electron?
-1
What is the charge of an neutron?
neutral
What is the charge of a proton?
+1/1
Why can graphite conduct electricity? [2]
It has a delocalised electron, that can carry an eletrical charge throughout the whole structure.
What is the formula of Buckminsterfullerene? C10 C20 C40 C50 C60 C70 C80 C90
Answer: C60
What are Alloys? And why are they harder than pure metals?
Alloy-mixtures of metal, with other elements (normally metals). • Because different size atoms distort the layers, this means they can’t slide over each other. -Therefore, this is why alloys are harder than pure metals.