Asuperconductor performs best at? ?

extremely high temperatures

room temperature

very cold temperatures

any temperature

Part of molten rock at mid-ocean ridges

How many atoms are there in 5.70 mol of mg

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.