Un átomo está esperando un electrón para completar los 8 en el último nivel de energia, será electropositivo? Si ¿ no? Porque?

Un átomo tiene2 electrones en su último nivel de energía. Es electronegativo?
Dará o recibirá electrones? Porqué?

2. how is heavy water different from normal water

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.