What is the ground state electron configuration for cr2+ , cu2+ and co3+?

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

If 10.5 l of a at 0.98to 1.50 , is ?