CHIMISTRY (UNIT 6)

Question 1

Representative particle of an ionic compound-

Answer 1

Formula unit

Question 2

Representative particle of a covalent substance-

Answer 2

Molecule

Question 3

Why do atoms bond with other atoms?

Answer 3

Intermolecular forces

Question 4

Ionic compound forms between-

Answer 4

Metal and nonmetal, or polyatomic ion

Question 5

What range of electronegativity difference is generally associated with-

Answer 5

Polar covalent bond .4 -1.7
Non-polar covalent < .4
Ionic bond > 1.7

Question 6

State the octet rule-

Answer 6

Atoms either transfer or share valence electrons until each atom has 8 valence electrons

Question 7

Which electrons are shown in a Lewis structure?

Answer 7

Valence electrons

Question 8

Ironically bonded substances are often called-

Answer 8

Salts

Question 9

Compare ironically bonded compounds to molecular compounds in terms of boiling point, hardness, and their ability to conduct electrical current when melted or dissolved-

Answer 9

Ionic- high melting and boiling points, good conductor

Covalent- low melting and boiling points, poor conductor

Question 10

Are ionic or molecular substances more likely to be gases at room temperature-

Answer 10

Molecular

Question 11

What bond is formed when electrons are shared-

Answer 11

Covalent bond

Question 12

Molecular polarity is determined by-

Answer 12

Lone pairs and the symmetry of the molecule

Question 13

Every electron needs 8 valence electrons except-

Answer 13

H- 2 valence electrons
Be- 4 valence electrons
B- 6 valence electrons

Question 14

What is the name of the theory that is used to predict the geometry of molecules-

Answer 14

Valence shell electron pair repulsion theory

Question 15

What is the definition of the “valence shell electron pair repulsion theory”

Answer 15

Predicts the geometry of the molecule based on bonds and lone pairs

Question 16

Abbreviation for “valence shell electron pair repulsion theory”

Answer 16

VSEPR

Question 17

Ionic compounds transfer or share electrons for Lewis structures?

Answer 17

Transfer

Question 18

Covalent bonds transfer or share electrons for Lewis structures?

Answer 18

Share

Question 19

How many atoms and lone pairs does linear have-

Answer 19

Atoms- 2
Lone pairs- 0

Question 20

How many atoms and lone pairs does bent have-

Answer 20

Atoms- 2
Lone pairs- 2 or 1

Question 21

How many atoms and lone pairs does trigonal planar have-

Answer 21

Atoms- 3
Lone pairs- 0

Question 22

How many atoms and lone pairs does trigonal pyramidal have-

Answer 22

Atoms- 3
Lone pairs- 1

Question 23

How many atoms and lone pairs does tetrahedral have-

Answer 23

Atoms- 4
Lone pairs- 0

Question 24

Which shape(s) will always be polar no matter what?

Answer 24

Bent and trigonal pyramidal

Question 25

London dispersion forces definition-

Answer 25

a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles

Question 26

Dipole-dipole forces definition-

Answer 26

attractive forces between the positive end of one polar molecule and the negative end of another polar molecule

Question 27

Hydrogen bonding definition-

Answer 27

a bond between the hydrogen atom and more electronegative elements like N, O, and F

Question 28

Molecular formula definition-

Answer 28

Exact number of each atom, not simplified Ex- C(2)H(6)

Question 29

Empire formula definition-

Answer 29

Simplified to simplest form Ex- CaCl(2)

Question 30

Ternary salt definition-

Answer 30

Contains 3 different elements (m+nm)

Question 31

Binary salt definition-

Answer 31

Contains 2 different elements (m+nm)

Question 32

Molecule definition-

Answer 32

One or more elements (nm+nm)

Question 33

1 covalent-

Answer 33

Mono

Question 34

2 covalent-

Answer 34

Di

Question 35

3 covalent-

Answer 35

Tri

Question 36

4 covalent-

Answer 36

Tentra

Question 37

5 covalent-

Answer 37

Penta

Question 38

6 covalent-

Answer 38

Hexa

Question 39

7 covalent-

Answer 39

Hepta

Question 40

8 covalent-

Answer 40

Octa

Question 41

9 covalent-

Answer 41

Nona

Question 42

10 covalent-

Answer 42

Deca

Question 43

Why is carbon special when drawing a Lewis structure atom-

Answer 43

Always in center if there is one of carbon

Question 44

IMF means what-

Answer 44

Intermolecular forces

Question 45

What is intramolecular-

Answer 45

existing or taking place within a molecule

Question 46

What is intermolecular-

Answer 46

existing or taking place between molecules