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Ions & Chemistry Revision
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what is the electronic configuration of nitrogen?
2,5
when an element is neutral, is it an atom or ion?
atom
when the number of protons = the number of electrons, the element is... charged or neutral?
neutral
what is the electronic configuration of carbon?
2,4
which element has an electronic configuration of 2,8,7
chlorine
which element has an electronic configuration of 2,8,8,2
calcium
which element has an electronic configuration of 2,8,1
sodium
which element has an electronic configuration of 2,6
oxygen
the outermost shell is known as the ____ shell
valence
what are negatively charged ions called?
anions
what are positively charged ions called?
cations
what happens when an atom gains an electron?
it becomes negatively charged
what happens when an atom loses an electron?
it becomes positively charged
what is the charge of an atom that has gained one electron?
-1
what is the charge of an atom that has lost one electron?
+1
Atoms are most stable when their outer shell is half filled with electrons. true or false?
false
Atoms that gain and lose electrons are called _____
ions
An electron has what kind of charge?
negative
A proton has what charge?
positive
Nitrogen, with an atomic number of 7, will gain ____ valence electrons when forming an ionic bond
3
If an element has 3 valence electrons, what charge will likely form on its ion?
+3
When an atom gains a valence electron, it becomes a ______ ion
negative
When an atom loses a valence electron, it becomes a _____ ion
positive
Describe an ion
Atoms with a positive or negative charge
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