QUESTION 2 Indicate whether the statements below describe ionic compounds, covalent compounds, or both. ✓ Compounds that contain only nonmetal atoms. A. both ✓ Compounds composed of positive and negative ions. B. covalent ✓ Compounds that are composed of molecules. C. ionic ✓ Compounds that are formed when electrons are shared between atoms. Compounds that are formed when electrons are transferred from one atom to another. Compounds that form when atoms bond together to become more stable. ✓ Compounds with lower melting points. Compounds with higher melting points. ✓ Compounds which conduct electricity when dissolved in water. Compounds which do not conduct electricity when dissolved in water. ✓ Compounds that are always solid at room temperature. Compounds that are sometimes solid at room temperature, but others are liquids or gases. ✓ Compounds that may or may not be water soluble.
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
• Here, we have to select the appropriate option for each given statements.
• We know the property of ionic compounds and covalent compounds.
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