Every element in the boron group has three electrons in its outermost shell (so-called valence electrons), and for each element there is a sharp jump in the amount of energy required to remove the fourth electron, reflecting the fact that this electron must be removed from an inner shell.

4 0

2 years ago

Help i wanna go 2 sleep but this is due tmrw morning :(((((((((((((((

Vlad1618 [11]

If Oxygen (O) lost 2 protons it would become Carbon (C).

5 0

3 years ago

A student needs to dilute a 0.25 M Pb(NO3)2 solution to make 73.0 mL of 0.13 M Pb(NO3)2 . Set up the calculation by placing the

Dmitry_Shevchenko [17]

Answer: Volume of 0.25 M solution is 38 ml

Explanation: Amount of substance n remains same.

n = c1V1 = c2V2 Solve V2 = V1c1 / c2 = 73,0 ml · 0.13 M / 0.25 M = 37.96 ml

5 0

3 years ago