2016年12月15日 · I would say K^2 Cations are ions with positive charges. K is in Group 1 of the periodic table, meaning it only needs to lose 1 electron in order to stabilize - as it has a charge of 1^+ Losing two electrons requires a lot of energy from K - meaning that it might not be a spontaneous reaction.

2018年5月21日 · +2 Strontium will lose the two outer valance electrons to form a stable noble gas electron structure. As electrons are negative losing two negative electrons will leave Strontium with a +2 charge.

2017年7月27日 · see below The question is very compless. Ga and Sr are two metals; they have in the last energetic level a number of electrons given from the number of the column of periodic table in which they lay; then Sr has two electrons that can lose and becomes Sr^(2+) while Ga becomes Ga^(3+) . Br an Se are non metals and they try to purchase electrons to complete their octet, becoming anions. Br in ...

2016年11月27日 · The "alkaline earth metals" have 2 valence electrons. The "alkaline earth metals" come from Group 2 of the Periodic Table. And since the Periodic Table reflects electronic structure, Be, Mg, Ca, Sr, Ba all have 2 valence electrons, and all commonly form M^(2+) ions.

2016年3月16日 · Atomic size decreases in the order: Ba; Sr; Mg. Atomic size decrease across a Period (from left to right) BUT INCREASE DOWN A GROUP. You have 3 alkaline earth metals: 3rd period magnesium; 5th period strontium; and 6th period barium. Clearly magnesium is the SMALLEST metal, and barium is the LARGEST.

2015年9月21日 · Factor out 135 completely so you can take out any perfect squares. #sqrt135# #=sqrt(3*3*3*5)# #=sqrt(3^2*3*5)# ...

2018年3月17日 · Well, at a guess, I would plump for MgO... Lattice energy depends on two parameters: (i) the size of the ion; and (ii) the charge on the ion... Why? Well, to a first approx. the electrostatic interaction depends on old Coulomb's law...and inverse square law. And clearly, those ions that are smaller will have GREATER electrostatic interaction....because of the 1/r^2 parameter... And also since ...

2014年12月5日 · If 525 mL of 0.80 M HCl solution is neutralized with 315 mL of Sr(OH)2 solution what is the... Why is stoichiometry called stoichiometry? How many grams of solid BaSO4 will form when Na2SO4 reacts with 25 mL of 0.50 M Ba(NO3)2?

2 Answers Jim G. Mar 9, 2018 #12sqrt10# Explanation: #"note that " 1440=144xx10" and 144 is a perfect ...

2015年9月22日 · Notice how #45# has a perfect square factor.. #sqrt45# #= sqrt9sqrt5# #= color(blue)(pm3sqrt5)# Now if you wanted the decimal answer, you could estimate it.