There is no element with the symbol Hc.
I have checked several periodic tables and find nothing I could imagine being identified this way.
11 is the atomic number for the element sodium in the periodic table.
Calcium.
cerium
iron
water
N stands for Nitrogen on the periodic table.
Beryilium
there is no such element
iodine
iodine
There is no element with the symbol "hc." It is possible that the symbols "H" and "C" were combined, which would refer to hydrogen (H) and carbon (C), two separate elements on the periodic table.
'h' doesn't mean anything in the Periodic Table. 'H' (Capital Letter) is hydrogen 'He' (Capital Letter followed by a lower case letter) is Helium. Careful with your use of capital/lower case letters. Follow as shown in the Periodic Table.
Argon is what Ar stands for on the Periodic Table of elements.
Sr stands for strontium on the periodic table of elements.
11 is the atomic number for the element sodium in the periodic table.
potassium
it is fluorine