CHEMICAL BONDING

Question 1

Compound

Answer 1

a substance that is made up of two or more different elements combined together chemically.

Question 2

Octet Rule

Answer 2

states that when bonding occurs, atoms tend to reach an electron arrangement with eight electrons in the outermost shell.

Question 3

Ion

Answer 3

a charged atom or group of atoms.

Question 4

Ionic bond

Answer 4

the force of atttraction between oppositely charged ions in a compound.

Question 5

Transition metal

Answer 5

is one that forms at least one ion with a partially filled d sublevel.

Question 6

Molecule

Answer 6

a group of atoms joined together. It is the smallest particle of an element or compound that can exist independently.

Question 7

Valency

Answer 7

of an element is defined as the number of atoms of hydrogen or any other monovalent element with which each atom of the element combines.

Question 8

Electronegativity

Answer 8

is the relative attraction that an atom in a molecule has for the shared pair of electrons in a covalent bond.

Question 9

Van der Waals forces

Answer 9

are weak attractive forces between molecules resulting from the formation of temporary dipoles.

Question 10

Dipole – Dipole forces

Answer 10

are forces of attraction between the negative pole of one molecule and the positive pole of another.

Question 11

Hydrogen bonds

Answer 11

are particular types of dipole-dipole attractions between molecules in which the hydrogen atoms are bonded to nitrogen, oxygen or fluorine. The hydrogen atom carries a partial positive charge and is attracted to the electronegative atom in another molecule. Thus, it acts as a bridge between two electronegative atoms.