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Atomic structure
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Isotopes
Atoms with the same number of protons or same atomic number but different numbers of neutrons
Anion
A negatively charged ion
Cation
A positively charged ion
Cation
A positively charged ion
What are ions?
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
Define Valency?
The number of electrons donated or accepted by an atom.
elements are chemically reactive because
they can gain or lose electrons to attain stable configuration.
The noble gases do not react because
they have a stable electronic configuration
Maximum number of electrons in a shell is given by the formulae
2n ^2
An atom is electrically neutral because
the number of protons and electrons are equal
What is electronic configuration?
The distribution of electrons in various orbits.
Define an Atom
Smallest particle of matter
Define Matter
Anything that occupies space and has mass


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