Explain how a star does not get too hot or too cold

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

How do you know when a chemical reaction has occurred

If i had 2 m naoh solution, what does the 2 m stand for? 2 molar, but 2 of a solute in 1