Brainscape's Knowledge GenomeTM

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


See full index

Chem > Chapter 3 > Flashcards

Chapter 3 Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

Proton: charge

A

+

Positive

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

Proton: mass

A

1 amu

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

Neutron: location

A

Nucleus

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

Neutron: charge

A

0

Zero; nothing

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

Neutron: mass

A

1 amu

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

Electron: location

A

Outside the nucleus

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

Electron: charge

A

-

Negative

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

U- 235:

  • Name
  • Protons
  • Neutrons
  • electrons
A

Name: uranium -235
Protons: 92
Neutrons: 143
Electrons: 92

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q 
1 H+ :
1
-Name
-Protons
-neutrons 
-electrons
A

Name: hydrogen -1 ion
Protons: 1
Neutron: 0
Electron: 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q 
84Kr
36
-Name
-Protons
-Neutrons
-Electrons
A

Name: krypton -84
Proton: 36
Neutron: 48
Electron: 36

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

What are the main points of daltons atomic theory?

A
  • all matter is composed of tiny particles called atoms
  • all atoms are identical, but differ those of any other reaction
  • atoms are not created/destroyed in chemical reactions
  • compound always has the same relative numbers and kinds of atoms
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Proton: location

A

Nucleus

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

What is a cathode ray tube?

A

A vacuum tube which contains a source of electrons and a fluorescent screen, with some means to accelerate and deflect the electron beam

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

Who experimented with cathode ray tubes and discovered electrons?

A

J.JThomas

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

What did the scientist JJ Thomas discover about electrons and why was this important?

A

Electrons are much smaller than the smallest atom and he discovered that they were negatively charged particles and they are important because they lead to the structure of an atom.

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

Describe Rutherfords gold foil experiment

A
  • took lead box
  • put radio activity in it
  • electron/alpha particular gun
  • most particles went straight through the gold foil
  • some deflected
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What 2 main points about the atom was discovered in the gold foil experiment?

A
  • atoms contain a nucleus

- the mass of an atom was concentrated at its center

18
Q

What is an ion?

A

An ion is something with more or less electrons than protons, the number of protons dint equal

19
Q

What is an isotope?

A

Different number of neutrons

Same number of protons

20
Q

Why are some isotopes unstable?

A

Have too many or not enough neutrons

21
Q

How do isotopes become stable?

A

By balancing out the number of protons and neutrons

22
Q

Alpha:

  • composition
  • charge
  • nuclear symbol
A 
Composition: 2 protons 2 neutrons 
Charge: +2
Nuclear symbol: 
4
HE
2
23
Q

Beta:
Composition
Charge
Nuclear symbol

A 
Composition: electron 
Charge: - (negative)
Nuclear symbol: 
0
e
-1
24
Q

Gamma:
Composition
Charge
Nuclear symbol

A 
Composition: pure energy 
Charge: 0
Nuclear symbol: 
0 (upside down fish)
0
25
Q

Who first proposed that matter is composed of tiny indivisible particles?

A

Democritus

26
Q

Which scientist developed the atomic theory of matter?

A

John Dalton

27
Q

A nucleus of four neutrons and four protons that is surrounded by two electrons is?

A

A positive ion

28
Q

What will a positive charge do?

A

Repel another positive charge

29
Q

What could a cathode ray do?

A

Could spin a small paddlewheel

30
Q

Who discovered electrons?

A

Thomson

31
Q

A hydrogen Atom has a charge of???

A

0

32
Q

Isotopes contain different numbers of…?

A

Neutrons

33
Q

True or false: radioactivity results from changes in the Atoms nucleus?

A

True

34
Q

True or false: the force that holds nuclear particles together is called the electrical force?

A

False

35
Q

True or false: gamma radiation consists of particles with a +2 charge?

A

False, alpha is +2

36
Q

True or false: in a cathode ray tube, the cathode ray comes from the anode

A

False, it comes from the cathode

37
Q

True or false: an electrons mass is essentially 1 amu?

A

False, 1/2000 amu

38
Q

True or false: the number of protons in an atom is called its atomic mass?

A

False, atomic number

39
Q

True or false: a isotope is an atom or a group of atoms having having a net electrical charge?

A

False, ion not isotope

40
Q

True or false: An atoms mass number is the sum of its protons and neutrons?

A

True

41
Q

Why is a nucleus with too few neutrons unstable?

A

Because there needs to be the same number of protons and neutrons

42
Q

What are the three subatomic particles in an atom and there charges?

A

Protons: positively charged
Neutrons: no charge
Electron: negatively charged

Chem (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions