Explain how Mendeleev, Moseley, and Ramsay contributed to developing the periodic table?

Which of the following did you identify correctly

The answer is the first option just took the test

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

Ans() ; the burning of them contributes to global warmingthey come from decayed organic material;