How many valence electrons does a magnesium atom have?
2
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15
True or False: Nonmetals tend to gain valence electrons to form stable ions.
True
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15
Which atom would require more energy to remove a valence electron, sodium or sulfur?
sulfur
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5
What are the horizontal rows of the Periodic Table called?
period(s)
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25
The periodic trend that describes the relative size of the atom is ...
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15
With the exception of hydrogen, helium, lithium, beryllium and boron, how many valence electrons do atoms need to be stable?
8 (octet)
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10
What are valence electrons?
electrons in the outermost energy level/shell
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25
Which element is more electronegative nitrogen or bromine?
nitrogen (remember when elements are equidistant from fluorine the one with less energy levels is more electronegative)
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5
How many energy levels does an aluminum atom have?
3
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25
Why do electronegativity and ionization energy increase as you move across a period from left to right?
the increasing number of protons causes a greater electromagnetic attraction between the protons & electrons, making it more difficult to remove electrons
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10
What does the period that an element is in tell you about its atomic structure?