what is the atomic number
number of protons
what is the mass number
number of protons plus neutrons
what is the group number
number of valence electrons
what is the period number
number of filled electron shells
what is an isotope
atoms with same number of protons but different number of neutrons
what is an ion
an atom that has lost or gained electrons and becomes electrically charged
why do atoms lose or gain electrons
to achieve a stable duplet or octet configuration
what is a positive ion called
cation
how is a cation formed
when an atom loses electrons
what is a negative ion called
anion
how is an anion formed
when an atom gains electrons
what is an ionic bond
electrostatic attraction between oppositely charged ions
how is an ionic bond formed
through the transfer of electrons from a metal to a nonmetal
what type of elements form ionic bonds
metals and nonmetals
what type of structure do ionic compounds have
giant ionic structure
why do metallic atoms tend to lose electrons
because they have less than four valence electrons
which groups do metallic atoms usually belong to
group one two and thirteen
why do nonmetallic atoms tend to gain electrons
because they have more than four valence electrons
which groups do nonmetallic atoms usually belong to
group fifteen sixteen and seventeen
in ionic bonding what must the number of electrons lost equal to
number of electrons gained
what is covalent bonding
sharing of electrons between nonmetal atoms
what does covalent bonding result in
formation of neutral molecules
where does electron sharing occur in covalent bonding
in the valence shell
how many electrons are shared in a single covalent bond
two electrons
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Interations With Ecosystem56
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Chemical Names And Formula15
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Acids And Alkalis32
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Forces And Energy60
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Chemical Changes18
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Work Done11
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Thermal Physics48
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Electricity62
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Chemical Bonding26
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Digestive System57
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Circulatory System36
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Reproductive Systems48
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Physical Properties And Measurements46
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Movement Of Substances31
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Atomic Structure24
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Light45
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Particulate Nature Of Matter37
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Separation Techniques43
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Elements Compounds Mixtures31
