I just finished my assignment and this is what I got. Try to put these in your own words. (: Hope this helps.
What is the position of an element in the periodic table if its electron configuration is 1s2 2s2 2p6 3s2 3p5
2 answers:
Answer : The position of an element in the periodic table is, Group 17 and Period 3
Explanation :
The given electronic configuration is,
Total number of electrons = 17
Number of valence electrons = 2 + 5 = 7
In the given configuration, 3 is the highest principle quantum number. Therefore, it belongs to the 3rd period in the periodic table.
If the elements belongs to the p-block then we have to determine the group number by,
Group number = Number of valence electrons + 10
Group number = 7 + 10 = 17
Hence, the position of an element in the periodic table is, Group 17 and Period 3
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Answer:
so the number of molecules in 8 moles of water is 4.8176×10^24
Explanation:
number of moles=8moles
avogadro's number=6.022×10²³
number of molecules=?
as we know that
substituting the equation
number of moles × avogdro's number=number of molecules
number of molecules=8moles×6.022×10²³
number of molecules=4.8176×10^24
i hope this will help you :)