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Chemistry > Midterm Exam > Flashcards

Midterm Exam Flashcards

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1
Q

What occupies most of the volume of an atom?

A

Electron

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2
Q

Anion

A

Number of protons is less than number of electrons Has one or more extra electrons Net charge is negative

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2
Q

What is the number at the top right of an element

A

Net charge

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3
Q

Milli

A

10^-3

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4
Q

What is the symbol for effective nuclear charge?

A

Zeff

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6
Q

What is the approximate mass of a neutron?

A

1 amu

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6
Q

What is the approximate mass of an electron?

A

0 amu

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7
Q

Force is inversely proportional to what?

A

The square of the distance

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8
Q

How many electrons can the k shell hold?

A

2

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8
Q

What is the formula for density?

A

D=m/v

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8
Q

What is the formula for speed?

A

S=d/t

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9
Q

What has/ have a mass of about 1 amu?

A

Proton and neutron

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11
Q

Mass number

A

The total number of protons and neutrons in the nucleus The approximate mass of the atom-the actual mass is slightly lower

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12
Q

Cation

A

The number of protons is more than the number of electrons Is missing one or more electrons Net charge is positive

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13
Q

What is the number of at the top left of an element

A

Mass number

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14
Q

Ionic

A

Metals and non metals, strong

14
Q

Isotopes

A

Atoms of the same element with different mass number Have the same number of protons, different numbers of neutrons

15
Q

Nano

A

10^-9

17
Q

Atomic number

A

The number of protons in the nucleus The total positive charge in the nucleus Which element

18
Q

Outermost electrons

A

Valence

19
Q

What do like charges do?

A

Repel

19
Q

Force is directly proportional to what?

A

The magnitudes of the charges

20
Q

How many electrons can the L shell hold?

A

Up to 8

22
Q

Micro

A

10^-6

23
Q

Mega

A

10^6

24
Q

What is the approximate mass of a proton?

A

1 amu

25
Q

What is atomic weight

A

Sum of the weights of all the isotopes each multiplied by its percent abundance

26
Q

What occupies most of the mass of an atom?

A

Proton

26
Q

What happens to electrons as you right to left and down the periodic table?

A

Decreases

28
Q

What has a -1 charge?

A

Electron

29
Q

Covalent

A

Two non metals, weak

32
Q

Natural abundance

A

The percentage of atoms of each isotope

33
Q

Net charge

A

The number of protons minus the number of electrons

34
Q

What do opposite charges do?

A

Attract

35
Q

Centi

A

10^-2

36
Q

What does the attraction for electrons do as you go across the periodic table left to right and up

A

Increases

37
Q

What has a charge of zero?

A

Neutron

38
Q

Kilo

A

10^3

39
Q

What is the charge of a +1?

A

Proton

Chemistry (4 decks)

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