Bromine, it's the only element that isn't a metal
La habla espanol yo soy un pedro!
Answer:
i think i like 14 or 8 atom
Explanation:
<span>Various gases and liquids have different densities and combustion points.</span>
Answer:
Isotopes are basically atoms of an element that have an unequal number of neutrons and protons. Of course the proton number remains the same, but the neutron number either decreases or increases, which leads to an overall change in mass. However, no chemical properties of the atom/element are changed as the electrons are the same number and do not react. In regards to Helium 4, the original number of neutrons in Helium is 2, and protons 2 as well. We see an equal number of neutrons and protons, hence an unchanged mass, and the element is <em>not</em> an isotope.