Hid BadAssWithABow,
Your Question:
Which of these elements has two electrons in its outer p orbitals? A. helium (He) B. barium (Ba) C. nitrogen (N) D. silicon (Si) E. sulfur (S)
Answer:
A. helium (He)
The reason its helium is because helium has 2 electrons.
The ions in the unknown salt are:
and 
The chemical formula of the salt is determined as shown in the picture.
The chemical formula of the salt is
.
Molarity of solution is expressed as,
Molarity =

Molecular weight of KCl = 74.55 g/mol
For preparing 1 mol of KCl solution (1 liter), 74.44 g KCl must be dissolved in 1 liter of water.
Following glasswares are required for preparing the solution.
1) Watch Glass (for weight the KCl)
2) Beaker (for preparing the solution)
3) Stirrer (For dissolving KCl in water)
4) Standard measuring flask (To ensure final volume of solution is 1 liter)
Answer:The units of molarity are M or mol/L. A 1 M solution is said to be “one molar.”
Explanation:
<span>sulfurs electronic configuration is
1s2 2s2 2p6 3s2 3p4
so for the 3p sublevel
principal quantum no - 3
angulum quantum no - 1
magnetic quantum no - (-1) or 0 or (-1)
spin quantum no - (+1/2) or (-1/2)
so the quantum numbers will be
[ 3 , 1, -1 , +1/2 ] or [ 3 , 1, -1 , -1/2 ]
[ 3 , 1, 0 , +1/2 ] or [ 3 , 1, 0 , -1/2 ]
[ 3 , 1, 1 , +1/2 ] or [ 3 , 1, 1 , -1/2 ]
Hope This Helps</span>