How many atoms of Fr are there?

A radioactive alkali metal with the atomic symbol Fr, and atomic number ANSWER: 87

The answer is 87;):);):);):):);)

Olá. porque a reação na temperatura é muito rapida a do copo : )

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