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How many valence electrons are in an atom of phosphorus? a. 2 b. 3 c. 4 d. 5
d. 5 The number of valance electrons any atom has can be found by looking at the group number at the top of the column the atom is in. [ Except for the transition metals (groups 3-12), single digit groups give the valence electrons, for double digit group numbers (groups 13-18), take the second of the two digits as the number of valence electrons. The transition elements usually have 2 but some
in groups 6 and 11 have only 1. So as the first responder noted, phosphorus in group 15 on the periodic table (a two digit group number) has 5 valence electrons. ]
Expert answered|cecillereign|Points 10|
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Asked 4/30/2013 9:13:09 AM
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The atomic number of an element is the total number of which particles in the nucleus? a. neutrons c. electrons b. protons d. protons and electrons
Weegy: The atomic number is equal to the total number of protons. (More)
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Expert Answered
Asked 4/23/2013 7:16:26 AM
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Choose the element that would be the most reactive of the three. a. Ba c. Be b. Mg
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Updated 4/30/2013 7:55:59 AM
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The element that would be the most reactive out of Ba (barium), Be (beryllium) and Mg (magnesium) is a. Ba (barium). These alkaline earth metals become increasingly more reactive as you go down the periodic table.
chemteacher.chemeddl.org/services/.../index.php?option=com...
Added 4/30/2013 7:56:00 AM
Alkali and alkaline earth metals are not reactive.
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Updated 8/5/2015 1:57:35 AM
1 Answer/Comment
Alkali and alkaline earth metals are not reactive. FALSE.
Added 8/5/2015 1:34:53 AM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by jeifunk [8/5/2015 1:57:38 AM]
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