Ions

Question 1

Octet rule

Answer 1

atoms want to fill valance shells to 8 electrons
atoms with closer to 8 have higher electronegativity

Question 2

ion

Answer 2

positively or negatively charged atom due to loss or gain of electrons

Question 3

anion

Answer 3

negatively charged ion

Question 4

cation

Answer 4

positively charged ion

Question 5

ionic bond

Answer 5

atoms have very different electronegatively and electrons are TRANSFERED

Question 6

non polar covalent bond

Answer 6

atoms have same electronegativity so share electrons

Question 7

polar covalent bond

Answer 7

atoms have similar but different electronegativity so there is a nonequal sharing of electrons; nucleus of stronger electronegativity pulls atoms toward it

Question 8

molecule

Answer 8

two or more atoms chemically combine to form unit

Question 9

compound

Answer 9

two ore more different types of atoms combine to form substance

Question 10

molecular mass

Answer 10

found by adding up atomic mass of atoms or ions

Question 11

single covalent

Answer 11

two atoms share one pair of electrons

Question 12

double covalent

Answer 12

two atoms share four electrons

Question 13

hydrogen bond

Answer 13

positively charged hydrogen bonds with negatively charged oxygen, nitrogen and fluorene
important role in deciding shape of molecule

Question 14

solubility

Answer 14

ability of substance to dissolve in one another

Question 15

dissociation

Answer 15

ionic compounds separate and become surrounded by water molecules
–cations attracted to negative end of water, anions attracted to positive end of water

Question 16

electrolytes

Answer 16

solutions made by disassociation of cations and and anions in water, have electrical current
can be detected by electrodes