Los elementos están ordenados en la tabla periódica de acuerdo a​

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax