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What are some examples of molecules
oxygen and hygrogen, and ozone
What are some elements that large clusters occur in?
They can occur in metals, diamonds, and graphite.
In which elements do we find isolated (with no bonds between them) atoms?
noble gases (helium, neon, argon, etc)
What are the 3 forms in which elements can occur?
Isolated atoms, large clusters, or molecules
What are compounds formed by?
More than one kind of atom
What are elements formed by?
Just one type of atom
What can pure substances be classified as?
Elements or compounds
What do mixtures consist of?
two or more pure substances
What do pure substances consist of?
just one type of matter
What does "cluster" mean?
group of the same type of things that are close together
What boes it mean to "bond" something?
To join two things strongly together
What are some ways in which atoms can ionise?
friction, electric discharges, collisions with other particles, or at extremely high temperatures that occur inisde stars
What is a cation or a positive ion?
An atom that loses electrons and aquires a net positive charge
what is an anion or negetive ion?
An atom that gains electrons and acquires a net negetive charge
What do you say when an atom has gained or lost electrons?
that it has been ionized
What is ionization?
The process by which atoms lose or gain electrons.
Which particles can transfer between atoms?
electrons. Protons and neutrins are fixed in place in the nucleus.


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