Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

phys/chem > Properties of Matter > Flashcards

Properties of Matter Flashcards

1
Q

How many electrons does a neutral potassium atom have?

A

19

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How many protons does silicon have?

A

14

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How many electrons does a neutral carbon atom have?

A

6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Lavoisier’s Law of Conservation of Mass…

A

Encouraged scientists to use mass sparingly, as it is a limited resource and says that whatever mass you begin with in a reaction you will also end with.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How many electrons does a potassium ion have?

A

18

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Carbon can combine with oxygen with a ration of 3 g C to 8 g O or 3 g C to 4 g O. This is an example of… ?

A

The law of multiple proportions developed by Dalton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How many protons does gold have?

A

79

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How many neutrons does an average argon atom have?

A

22

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How many electrons does a chlorine ion have?

A

18

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Thompson’s Cathode Ray Tube

A

Discovered the electron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Millikan’s Oil Drop

A

Measured the charge of the electron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Rutherford Gold Foil

A

Proved there was a small, positive nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How many protons does beryllium have?

A

4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How many electrons does a magnesium ion have?

A

10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How many electrons does a neutral cobalt atom have?

A

27

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How many electrons does a sulfide ion have?

A

18

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Pure table salt (NaCl), no matter where it comes from, contains 39.3% Na (sodium) by mass. This is an example of… ?

A

The law of definite proportions by Proust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How many protons does titanium have?

A

22

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How many protons does rubidium have?

A

37

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How many neutrons does an average Na atom have?

A

12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

How many neutrons does an average Calcium ion (with a 2- charge) have?

A

20

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

How many neutrons does an average arsenic with a negative three charge have?

A

42

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

How many valence electrons (dots) does oxygen have?

A

6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

How many valence electrons does Be have?

A

2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What charge do protons have?

A

+1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

How many valence electrons does Cl have?

A

7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What charge do neutrons have?

A

0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What charge do electrons have?

A

-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

The number of electrons in neutral atoms is equal to

A

number of protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

The mass number of atom is equal to the sum of _______

A

the number of protons and electrons.

30
Q

Positive charge

A

subtract amount from electrons

31
Q

Negative charge

A

add amount of charge to electrons

32
Q

Metals

A

shiny, conducts electricity, conducts heat, positive charge

33
Q

Nonmetals

A

make negative charges, not shiny

34
Q

cation

A

charge to metals, positive

35
Q

anion

A

charge to nonmetals, negative

36
Q

ionic compound

A

metals and nonmetals

37
Q

metallic compound

A

metals and metals

38
Q

molecular compound

A

nonmetals and nonmetals

39
Q

number of electrons in an element

A

how far over they are horizontally

40
Q

when combining 2 elements they always need to become

A

0 electrons

41
Q

full outer shell

A

8 electrons

42
Q

physical change

A

doesn’t change chemical compound

43
Q

chemical change

A

changes the chemical compound

44
Q

All elements want 8 electrons except

A

hydrogen and helium

45
Q

the center atom can never be

A

hydrogen

46
Q

The compound NaBr is

A

ionic

47
Q

The compound barium fluoride is

A

ionic

48
Q

The compound sulfur difluoride is

A

molecular

49
Q

The compound CO is

A

molecular

50
Q

The compound Brass (Cu + Zn) is

A

metallic

51
Q

The compound Rose gold (Au + Cu) is

A

metallic

52
Q

What is the correct name for MgCl2?

A

Magnesium chloride

52
Q

What is the correct name for SBr2?

A

Sulfur dibromide

53
Q

What is the correct chemical formula for sodium fluoride?

A

NaF

54
Q

What is the correct name for LiBr?

A

Lithium bromide

55
Q

What is the correct chemical formula for nitrogen dioxide?

A

NO2

56
Q

How many bonds does sulfur need to make to get a full octet?

A

2

57
Q

How many bonds does Fluorine need to make to fill its octet?

A

1

58
Q

How many bonds does carbon need to make to fill its octet?

A

4

59
Q

What will be the central atom in the molecule NH3?

A

N

60
Q

What will be the central atom in the molecule H2O?

A

O

61
Q

Dipole-dipole

A

polar molecules stuck together

62
Q

hydrogen bonding

A

H is stuck to F, O, or N. very strong

63
Q

dispersion

A

wave nature of electrons, any molecule that have electrons has dispersion

64
Q

A material is very hard and melts at high temperatures, but will dissolve in water and will break along planes and with repeating angles when it breaks. What type of material is it most likely?

A

Ionic

65
Q

Gasoline (a mixture of compounds, but all with lots of C and H and all are nonpolar) evaporates much more quickly when spilled than water does. Why?

A

Gasoline has no hydrogen bonds or dipole-dipole interactions holding molecules together, while water has both

66
Q

Plastics are often flexible and melt at fairly low temperatures. What type of material are they?

A

Molecular

67
Q

Non polar molecules

A

are symmetric with no unshared electrons.

68
Q

Polar molecules

A

are asymmetric, either containing lone pairs of electrons on a central atom or having atoms with different electronegativities bonded

69
Q

According to the original version of atomic theory postulated by Dalton, atoms were ________

A

hard spheres

70
Q

Groups of elements that have similar properties are called _____

A

families

71
Q

Ceramics are stable at very high temperatures, but are prone to shattering. What type of material is a ceramic?

A

Ionic

72
Q

What is the origin of dispersion forces?

A

Random variations in electron distribution

phys/chem (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions