answer true or flase. don't need an explanation or solution (a) A covalent bond is formed between two atoms whose difference in electronegativity is less than 1.9. (b) If the difference in electronegativity between two atoms is zero (they have identical electronegativ- ities), then the two atoms will not form a covalent bond. (c) A covalent bond formed by sharing two electrons is called a double bond. (d) In the hydrogen molecule (H2), the shared pair of electrons completes the valence shell of each hydrogen. (e) In the molecule CH4 , each hydrogen has an electron configuration like that of helium and carbon has an electron configuration like that of neon. (f) In a polar covalent bond, the more electronegative atom has a partial negative charge (2) and the less electronegative atom has a partial positive charge (1). (g) These bonds are arranged in order of increasing polarity CiH , NiH , OiH. (h) These bonds are arranged in order of increasing polarity HiF , HiCl , HiBr. ( i) A polar bond has a dipole with the negative end located at the more electronegative atom. (j) In a single bond, two atoms share one pair of electrons; in a double bond, they share two pairs of electrons; and in a triple bond, they share three pairs of electrons. (k) The Lewis structure for ethane, C2H6, must show eight valence electrons.
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.
answer true or flase. don't need an explanation or solution
(a) A covalent bond is formed between two atoms whose difference in electronegativity is less than 1.9.
(b) If the difference in electronegativity between two atoms is zero (they have identical electronegativ- ities), then the two atoms will not form a covalent bond.
(c) A covalent bond formed by sharing two electrons is called a double bond.
(d) In the hydrogen molecule (H2), the shared pair of electrons completes the valence shell of each hydrogen.
(e) In the molecule CH4 , each hydrogen has an electron configuration like that of helium and carbon has an electron configuration like that of neon.
(f) In a polar covalent bond, the more electronegative atom has a partial negative charge (2) and the less electronegative atom has a partial positive charge (1).
(g) These bonds are arranged in order of increasing polarity CiH , NiH , OiH.
(h) These bonds are arranged in order of increasing polarity HiF , HiCl , HiBr. (
- i) A polar bond has a dipole with the negative end located at the more electronegative atom.
(j) In a single bond, two atoms share one pair of electrons; in a double bond, they share two pairs of electrons; and in a triple bond, they share three pairs of electrons.
(k) The Lewis structure for ethane, C2H6, must show eight valence electrons.
Step by step
Solved in 10 steps
