Impure substance, because pure would be dirt from the earth
Al2so4+NaOH =Naso4+AlOH= so I think it’s B not sure
Answer:
See explanation
Explanation:
Electron affinity is the energy released when an extra electron is added to a neutral gaseous atom. A negative value of electron affinity indicates that energy is given out and vice versa.
Metals have positive electron affinity since electrons rarely accept electrons, so;
Na(g)+ 1e^- → Na^-(g) positive
Mg(g)+1e^- → Mg^-(g) positive
For the last case; Br(g)+ 1e^- → Br^-(g), the electron affinity for the non-metals is negative. hence the answer
Answer:
Because if it didn't have structure then your body would fall apart
Explanation:
If you didn't have a spine you couldn't stand up straight
The element from those four that is a noble gas is krypton.
