Unit 1, Bonding and Properties of Compounds

Question 1

Chemical Bond

Answer 1

forces that hold groups of atoms together and make them function as a unit

Question 2

Ionic bonding

Answer 2

electrons are transferred

Question 3

Dissociate

Answer 3

soluble ionic compounds dissociate (come apart) in aqueous environments

Question 4

Aqueous

Answer 4

mixed in water

Question 5

Electrolytes

Answer 5

Ionic compounds conduct electricity only when ions are separated and free to move, dissolved, and are water soluble

Question 6

Properties of ionic compounds

Answer 6

hard, brittle, solid at room temp, high melting and boiling points due to the crystal lattice structure holding the atoms in place

Question 7

Covalent bonding

Answer 7

electrons are shared equally or not fully equally by the nuclei

Question 8

Polar covalent bond

Answer 8

unequal sharing of electrons between atoms in a molecule
results in a charge separation in the bond (partial negative and partial positive charge)

Question 9

Electronegativity

Answer 9

the ability of an atom in a molecule to attract shared electrons to itself

Question 10

dipole moment

Answer 10

property of a molecule whose charge distribution can be represented by a center of positive charge and a center of negative charge
-use arrow to represent
-point to neg center
-plus sign tail to pos center of charge

Question 11

properties of covalent compounds

Answer 11

-exists in all states of matter at room temp
-low melting and boiling points compared to ionic compounds (lessening the attraction btwn atoms, not breaking bonds)
-produces non-electrolytes when dissolved in water