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Chemistry > Chapter 4 > Flashcards

Chapter 4 Flashcards

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0
Q

Didn’t believe in atoms

Thought matter was continuous

A

Aristotle

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1
Q

Means indivisible

A

Atom

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2
Q

Mass is neither created or destroyed during regular chemical or physical changes

A

Law of conservation of mass

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3
Q

Any amount of a compound contains the same element in the sans proportions by mass

A

Law of definite proportions

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4
Q

Applies when 2 or more elements combine to make more than one type of compound

A

Lw of multiple proportions

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5
Q

T or F all atoms of a given element are identical

A

True

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6
Q

T or F atoms are not divisible into smaller particles

A

False. Subatomic particles

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7
Q

T or F atoms of the same element can have different mass isotopes

A

True

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8
Q

T or F atoms aren’t indivisible by chemical processes

A

False they are

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9
Q

Law of conservation of mass follows from the concept that

A

Atoms are indivisible

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10
Q

Which concept in Dalton’s atomic theory has been modified?

A

Atoms cannot be divided

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11
Q

Experiments with cathode rays led to the discovery of the

A

Electron

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12
Q

Whose experiment bombarded gold foil with positively charged particles and noted that some particles were widely deflected

A

Rutherford

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13
Q

Discovered the nucleus

A

Rutherford

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14
Q

J. J. Thompson discovered

A

The electron

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15
Q

Positively charged particle is

A

Proton

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16
Q

Not true about the nucleus of an atom is that

A

It contains nearly all of the atoms volume

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17
Q

An atom is electrically neutral because

A

The number of protons and electrons are equal

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18
Q

Atoms of the same element that have different masses are called

A

Isotopes

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19
Q

In determining atomic mass units, the standard is the

A

C-12 atom

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20
Q

An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. It’s mass number is

A

27

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21
Q

To find mass number

A

Add protons and neutrons

22
Q

To find neutrons

A

Subtract mass number from protons

23
Q

An atom of potassium has 19 protons and 20 neutrons mass number?

A

39

24
Q

Sulfur-34 (atomic number 16) contains

A

18 neutrons

25
Q

Neon-22 contains 12 neutrons it also contains

A

10 protons

26
Q

Calcium-48 (atomic number 20) contains

A

20 electrons

27
Q

PEZ means

A

Protons electrons and atomic number are all the same

28
Q

T or F mass number is the same as atomic number

A

False

29
Q

The carbon-12 atom is assigned a relative mass of exactly

A

12 amu

30
Q

Two oxides of lead, PbO and PbO2 are explained by the

A

Low of multiple proportions

31
Q

Principled of atomic theory recognized today were conceived by

A

Dalton

32
Q

T or F atoms of the same element may have different masses

A

True

33
Q

The discovery f the electron resulted from experiments using

A

Cathode rays

34
Q

In Rutherfords experiment most of the particles

A

Passes through the foil

35
Q

Rutherfords experiments led to the discovery of the

A

Nucleus

36
Q

Protons have

A

An attraction for neutrons

37
Q

The charge on the electron cloud

A

Balances the charge on the nucleus

38
Q

All isotopes of hydrogen contain

A

One proton

39
Q

Nickel-60 (atomic number 28) has

A

32 neutrons

40
Q

T or F neutrons of negatively charged

A

False

41
Q

Atoms of the same element with different number of neutrons

A

Isotopes

42
Q

When writing nuclear symbol notation, what’s on top? Bottom?

A

Mass number on top

Atomic number on bottom

43
Q

Transition elements are all

A

Metals

44
Q

Bottom row consists of

A

Inner transition elements

45
Q

Ions that have a positively charge

A

Cations

46
Q

Ions that have a negatively charge

A

Anions

47
Q

Form when a atom loose electrons

A

Cations

48
Q

Forms when a atom gains electrons

A

Anions

49
Q

Ions with opposite charges attract

A

Ionic compound

50
Q

Named by changing the ending of the name to

A

Ide

51
Q

Mass is neither created nor destroyed during regular chemical or physical changes

A

L’s of conservation of mass

52
Q

Any amount of a compound contains the same element in the same proportions by mass

A

Lw of definite proportions

53
Q

Applies when 2 or more elements combine to make more than one type of compound

A

Lw of multiple proportions

Chemistry (11 decks)

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