Busca en la tabla periódica los siguientes elementos, indica el grupo y período. Representa mediante un dibujo su estructura atómica y explica con tus palabras que significa el valor de su número atómico y de su
masa atómica. Calcula el número de neutrones (masa atómica – número atómico).
1. Oxígeno (O)
2. Hidrógeno (H)
3. Carbono (C )
4. Nitrógeno (N)
5. Fósforo (P)

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: