What are some possible replacements for Tin (Sn)?

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Which substances have the lowest melting points: ionic covalent, or metallic

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