The rolls in the table are called periods . which characteristic of the elements increases as you move across a period from left to right ?

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

Can someone me with 6 to 10 plz this is for masteries test.

Element before carbon on the periodic table