May 21, 2018 · +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.

Dec 15, 2016 · 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.

Mar 16, 2016 · 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.

Jul 27, 2017 · 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 …

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

Mar 20, 2018 · The square root will start by a 8 (sqrt(64)) 1) Subract 6400 from 7921 and you obtain 1521. 2)take 8 multiply it by 20 and add find the larger number bar(16n)xxn smaller or equal than 1521. 169xx9 is exactly 9 3) so the solution is 89

Jun 23, 2018 · 2 .Many monatomic ions are found in seawater, including the ions formed from the following list of elements. Write the Lewis symbols for the monatomic ions formed from the following elements: (a) K (b) Mg (c) Sr (d) Br (e) F

Oct 26, 2017 · Warning! Very long answer. You make sure that the sums of the superscripts and the sums of the subscripts are the same on each side of the equation. > A. First, write the equation using nuclear symbols of the type ""_A^Z"X". The atomic number (or nuclear charge) A is a subscript at the lower left. The mass number Z is a superscript at the upper left. "X" is the …

Oct 25, 2015 · Ionization energy increases across a Period (from left to right); and decreases down a Group (top to bottom). On simple electrostatic grounds, this is reasonable, as we go the right of the Periodic Table, the nuclear charge increases sequentially, and electrons are added to the same shell. Accordingly the Noble gases have the highest ionization energies inasmuch as …

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