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Exam Flashcards > CHM031 M1 SA W3 > Flashcards

CHM031 M1 SA W3 Flashcards

1
Q

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

A

Dalton’s Atomic Theory

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2
Q

How many postulates does the Modern Atomic Theory have?

A

3 Main Postulates

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3
Q

What are the 3 Basic Laws of Chemistry?

A

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

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4
Q

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

A

Law of Conservation of Mass

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5
Q

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

A

Law of Constant Composition

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6
Q

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.

A

Law of multiple proportions

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7
Q

What subatomic particles are atoms made of?

A

Positive protons, negative electrons, and neutral neutrons

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8
Q

what occupies the most volume of the nucleus?

A

electrons

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9
Q

what is the charge of atom?

A

10^-10 m

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10
Q

what is the charge of nucleus?

A

10^-14 m

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11
Q

What are the 3 different kinds of Hydrogen?

A

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

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12
Q

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

A

Isotope

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13
Q

What letter corresponds to the mass number of atom?

A

A

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14
Q

2 or more atoms combine to form uncharged molecule

A

Molecule

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15
Q

Atoms involved in molecules are —?

A

Nonmetallic elements

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16
Q

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

A

Covalent Bonds

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17
Q

What are the 3 ways of visualizing/depicting molecules?

A

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

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18
Q

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

A

Structural Formulas

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19
Q

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

A

3-D Representations

20
Q

spheres=atoms
sticks=bonds

A

Ball-and-Stick Model

21
Q

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

A

Space-Fillin Model

22
Q

charged particles where atoms loses or gains electrons

A

Ions

23
Q

metal atoms tend to lose electrons to form positively charged ions

A

Cations

24
Q

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

A

Anion

25
Q

it summarizes periodic properties of elements

A

Periodic Table

26
Q

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

A

Early versions of periodic table

27
Q

arranged by increasing atomic number

A

Modern Periodic Table

28
Q

what is the term for rows?

A

periods

29
Q

what are the terms for column?

A

Groups or families

30
Q

What is the main group element?

A

A groups

31
Q

What is the transition element?

A

B groups

32
Q

How many periods does the periodic table have?

A

7 periods

33
Q

how many known elements?

A

118

34
Q

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

A

Halogens

35
Q

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

A

Noble gases

36
Q

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

A

Helium, Neon, Argon

37
Q

Representative/ Main Group Element

A

A group: Halogens and Noble Gases

38
Q

Transition Elements

A

B groups

39
Q

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

A

B groups

40
Q

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

A

Inner Transition Elements

41
Q

2 categories of the Inner Transition Elements that are all radioactive

A

Lanthanide and Actinide

42
Q

3 broad categories of the periodic table

A

Metals, Nonmetals, and Metalloids

43
Q

left-hand side category

A

Metals

44
Q

upper right-hand corner category

A

Nonmetals

45
Q

diagonal line between metals and nonmetals

A

Metalloids

Exam Flashcards (4 decks)

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