You are given a mysterious compound and you have to determine if it is ionic or covalent. The substance as a solid does not conduct electricity, however, when dissolved in water, it acts as a good conductor. Which of the following substances could it possibly be: NH3, HClO3, CoCl2?
What is CoCl2?
400
Magnesium ion is smaller than Calcium ion for this reason
Less energy levels
400
As we move up a group on the periodic table the ionization energy increases for this reason
What is due to the fact that the valence electrons are closer to the nucleus; effective nuclear charge; smaller ionic radius
400
What are the formulas for barium chloride, aluminum, sulfate, and sodium oxide?
-high melting point/boiling point
-dissolves in water and becomes a good conductor
-poor conductor as a solid
-crystal lattice structure
500
Please arrange the following elements based on increasing ionic size:
Strontium, Bromide, Selenide, and Rubidium ions. Please give the correct symbols and charges
Sr 2+, Rb 1+, Br 1-, and Se 2-
500
What is the effective nuclear charge of sulfur? Of chlorine? Which has a higher nuclear charge?
S=+6
Cl=+7
Chlorine has a higher nuclear charge
500
If the charge of element X is +6 and the charge of element Y is -3, the formula of the compound formed is: