Señale la cantidad de oxígenos que tiene el ácido carbónico
a)3
b)1
c)2

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

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?

1. list three scientific reasons cockroaches may fly.