CHM031 M1 SA W3

Question 1

model of matter based on the hypothesis that each element is made of indivisible particles called atoms

Answer 1

Dalton’s Atomic Theory

Question 2

How many postulates does the Modern Atomic Theory have?

Answer 2

3 Main Postulates

Question 3

What are the 3 Basic Laws of Chemistry?

Answer 3

Law of Conservation of Mass, Law of Constant Composition, & Law of Multiple Proportions

Question 4

What law? no detectable change in mass in an ordinary chemical reaction (postulate 2)

Answer 4

Law of Conservation of Mass

Question 5

What law? compound always contains the same elements in the same proportion by mass (postulate 3)

Answer 5

Law of Constant Composition

Question 6

What law? Formulated by Dalton states, two elements form more than one compound and masses of one element that combine with a fixed mass of second element are in a ratio of small whole numbers.

Answer 6

Law of multiple proportions

Question 7

What subatomic particles are atoms made of?

Answer 7

Positive protons, negative electrons, and neutral neutrons

Question 8

what occupies the most volume of the nucleus?

Answer 8

electrons

Question 9

what is the charge of atom?

Answer 9

10^-10 m

Question 10

what is the charge of nucleus?

Answer 10

10^-14 m

Question 11

What are the 3 different kinds of Hydrogen?

Answer 11

Light Hydrogen (no n), Deuterium (1 n), & Tritium (2 n)

Question 12

What do you call an atom that contains the same number of protons with different number of neutrons?

Answer 12

Isotope

Question 13

What letter corresponds to the mass number of atom?

Answer 13

A

Question 14

2 or more atoms combine to form uncharged molecule

Answer 14

Molecule

Question 15

Atoms involved in molecules are —?

Answer 15

Nonmetallic elements

Question 16

strong forces that hold the atom which consists shared pairs of e-.

Answer 16

Covalent Bonds

Question 17

What are the 3 ways of visualizing/depicting molecules?

Answer 17

Structural formula, ball-and-stick model, and space-filling model

Question 18

it is how atoms are attached, represented by chemical symbols, and chemical bonds are indicated by lines

Answer 18

Structural Formulas

Question 19

fused shapes for molecules, different colors for different elements, and relative sizes for atom sizes

Answer 19

3-D Representations

Question 20

spheres=atoms
sticks=bonds

Answer 20

Ball-and-Stick Model

Question 21

relative sizes of atoms and how atoms take up space in molecule

Answer 21

Space-Fillin Model

Question 22

charged particles where atoms loses or gains electrons

Answer 22

Ions

Question 23

metal atoms tend to lose electrons to form positively charged ions

Answer 23

Cations

Question 24

nonmetal atoms form negative ions by gaining electrons and protons are unchanged

Answer 24

Anion

Question 25

it summarizes periodic properties of elements

Answer 25

Periodic Table

Question 26

arranged by increasing atomic mass Mendeleev (Russian) and Meyer (German) in 1869.

Answer 26

Early versions of periodic table

Question 27

arranged by increasing atomic number

Answer 27

Modern Periodic Table

Question 28

what is the term for rows?

Answer 28

periods

Question 29

what are the terms for column?

Answer 29

Groups or families

Question 30

What is the main group element?

Answer 30

A groups

Question 31

What is the transition element?

Answer 31

B groups

Question 32

How many periods does the periodic table have?

Answer 32

7 periods

Question 33

how many known elements?

Answer 33

118

Question 34

What do you call the group of 7A, reactive, form 1 ion with alkali metals (salts), and form diatomic molecules in elemental state

Answer 34

Halogens

Question 35

8A, inert/very unreactive, don't form charged ions

Answer 35

Noble gases

Question 36

What are the monatomic gases in the group of noble gases?

Answer 36

Helium, Neon, Argon

Question 37

Representative/ Main Group Element

Answer 37

A group: Halogens and Noble Gases

Question 38

Transition Elements

Answer 38

B groups

Question 39

all metals, center of PT, starts in 4th row forms ions with several different charges

Answer 39

B groups

Question 40

located at the bottom of PT, form +2 and +3 ions

Answer 40

Inner Transition Elements

Question 41

2 categories of the Inner Transition Elements that are all radioactive

Answer 41

Lanthanide and Actinide

Question 42

3 broad categories of the periodic table

Answer 42

Metals, Nonmetals, and Metalloids

Question 43

left-hand side category

Answer 43

Metals

Question 44

upper right-hand corner category

Answer 44

Nonmetals

Question 45

diagonal line between metals and nonmetals

Answer 45

Metalloids