Element M reacts with fluorine to form ionic compound with the formula MF3. what is element M?

Which is true of transition metals when moving from left to right on the periodic table? the d sublevels are not filled across the period. the cation radii become larger across the period. atomic radii increase slightly and then start to decrease. atomic radii decrease slightly and then start to increase. o

What is the relation between concentration of reactants and the rate of chemical reaction?

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )