Density = mass / volume
9.51 = m / 9.26
9.51 * 9.26 = m
m = 88.0626
Change in color, change in temp, formation of gas, formation of precipitate
The answer is it tends to be more negative down a group. This is because as you go down the periodic table, the elements have more electron shells in their atoms. This makes the outermost shells less attracted to the nucleus due to their greater distances from the nucleus. Therefore, these shells are less likely to attract electrons (hence lower electron affinity) and are even more likely to lose electrons from their outer electron orbits.
D, and the system combine to form organism
a system is the breathing one for example
