<span>The answer is Cs, no. 2.
Cesium (Cs) is an element which has an outermost electron with most energy in
the ground state.</span>
Cesium (Cs), Lithium (Li), Potassium
(K), and Sodium (Na) are elements which belong to the group 1 family, the
alkali metals. Each has a valance of 1 and wants to release/ lose this e-
(electron) to be isoelectronic with the nearest noble gas. Based on the
periodic trends, an atom’s radii will raise going down a group.
<h2>A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.</h2><h2>Examples of Chemical Changes</h2><h2>Examples of Chemical ChangesBurning wood.</h2><h2>Examples of Chemical ChangesBurning wood.Souring milk.</h2><h2>Examples of Chemical ChangesBurning wood.Souring milk.</h2>
Volume of base(NaOH)= Vb =5 mL Concentration of base(NaOH)= Mb =2 M Volume of acid(HCl)= Va =10 mL Concentration of acid(HCl)= Ma = ? Now, Ma*Va = Mb*Vb Ma*(10) = (2)*(5)
