Multiple Choice
The chemical characteristics or reactivity of an element depend mostly on the __________.
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many valence electrons do barium and phosphorus have, respectively?
A
5 and 2
B
8 and 5
C
2 and 5
D
2 and 3
Verified step by step guidance1
Identify the group number of each element in the periodic table to determine their valence electrons. Valence electrons are the electrons in the outermost shell of an atom.
For barium (Ba), locate it in Group 2 of the periodic table. Elements in Group 2 have 2 valence electrons.
For phosphorus (P), locate it in Group 15 (or Group 5A) of the periodic table. Elements in this group have 5 valence electrons.
Confirm that barium has 2 valence electrons and phosphorus has 5 valence electrons based on their group numbers.
Therefore, the number of valence electrons for barium and phosphorus are 2 and 5, respectively.
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