How many moles are there in 3.1 və X10
Formula units of Na2SO4

Which answer lists the fundamental forces in order from strongest to weakest

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false