knowledge 4.2 / skill 4.1

Question 1

diatomic molecules

Answer 1

elements which are always found in paired molecules (2 atoms)

Question 2

which elements are diatomic molecules?

Answer 2

hydrogen, oxygen, fluorine, bromine, iodine, nitrogen, chlorine

Question 3

chemical bond

Answer 3

a mutual attraction bet ween the the nucleus (positive charge) and valence electrons (negative charge) of different atoms which binds the atoms together

Question 4

covalent bond

Answer 4

nonmetals + nonmetals
electron pairs are shared

Question 5

ionic bond

Answer 5

nonmetal + metal
electrons are TRANSFERRED

Question 6

metallic bond

Answer 6

metal + metal

Question 7

molecule

Answer 7

NEUTRAL group of atoms held by covalent bonds

Question 8

octet rule

Answer 8

atoms like to have 8 electrons in their valence shell, so they will form to make chemical compounds according to that preference

Question 9

dual rule

Answer 9

only applies to hydrogen and helium, atoms like to have 2 electrons in their valnece shell when they make compounds

Question 10

which 2 orbitals are included in the number of valence electrons?

Answer 10

s and p electrons

Question 11

besides the dual rule, what’s another exception to the octet rule

Answer 11

boron - likes to form with 6 electrons because of its 3 valence electrons

Question 12

how do you name binary molecular compounds?

Answer 12

first element - do NOT use mono if only one
second element - put “ide” at the end, use mono if single

Question 13

mono

Answer 13

one atom

Question 14

di

Answer 14

2 atoms

Question 15

tri

Answer 15

3 atoms

Question 16

tetra

Answer 16

4 atoms

Question 17

penta

Answer 17

5 atoms

Question 18

hexa

Answer 18

6 atoms

Question 19

hepta

Answer 19

7 atoms

Question 20

octa

Answer 20

8 atoms

Question 21

nona

Answer 21

9 atoms

Question 22

deca

Answer 22

10 atoms