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15
×
Maximum number of electrons in a shell is given by the formulae
2n ^2
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Define Matter
Anything that occupies space and has mass
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What are ions?
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
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An atom is electrically neutral because
the number of protons and electrons are equal
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Define an Atom
Smallest particle of matter
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thief
Give points!
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25
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star
Double points!
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rocket
Go to first place!
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thief
Give points!
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25
15
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elements are chemically reactive because
they can gain or lose electrons to attain stable configuration.
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eraser
Reset score!
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shark
Other team loses 20 points!
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shark
Other team loses 5 points!
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lifesaver
Give 25 points!
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15
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The noble gases do not react because
they have a stable electronic configuration
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Isotopes
Atoms with the same number of protons or same atomic number but different numbers of neutrons
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Cation
A positively charged ion
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lifesaver
Give 25 points!
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rocket
Go to first place!
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fairy
Take points!
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25
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baam
Lose 25 points!
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Define Valency?
The number of electrons donated or accepted by an atom.
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Anion
A negatively charged ion
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Cation
A positively charged ion
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What is electronic configuration?
The distribution of electrons in various orbits.
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