stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Unit 2: Atomic Structure Flashcards | StudBud
Explore
/
Unit 2: Atomic Structure
Unit 2: Atomic Structure
45 terms
·
StudBud Administration
·
4,869 plays
Imported from external platform
Flashcards
45 cards
F
Practice quiz
P
Host live
L
Questions
45
Answers
1
True or false: opposites attract
false
true
2
Why did James Chadwick propose the existence of neutrons?
He noticed that only some objects are charged
He noticed the masses of nuclei didn't add up as expected
He saw the evidence from Rutherford's experiment
He didn't agree with JJ Thomson's model
3
The most common isotope of chlorine is most likely:
Chlorine-17
Chlorine-18
Clorine-36
Chlorine-35
4
If a carbon atom has a mass of 14 amu, how many protons and neutrons does it have?
8 protons and 6 neutrons
8 protons and 8 neutrons
6 protons and 6 neutrons
6 protons and 8 neutrons
5
True false: Dalton believed that atoms were indivisible
true
false
6
Where are protons located?
in the nucleus
outside the nucleus
7
How many electrons are in a neutral chlorine atom?
36
35
17
18
8
I wanted 45 questions instead of 44. What month is it?
September
October
I don't even know anymore
May
9
How many protons are in a neutral fluorine atom?
9
19
10
8
10
What is the mass of a proton?
2 amu
no mass
significantly less than 1 amu
1 amu
11
What is the charge on an electron?
it depends on how much energy it has
positive 1
no charge
negative 1
12
Which of the following is a part of Benjamin Franklin's theory of electrostatics?
Electrons are negatively charged
There are two types of charges
Only some objects contain charged particles
Neutrons have no charge
13
Where are electrons located?
outside the nucleus
in the nucleus
14
Which charges are mobile (easily moved from one object to another)
Positive
Neutral
Negative
15
Which of the following best summarizes JJ Thomson's Plum Pudding Model?
Dense, positive nucleus surrounded by negative charges
Electrons organized by energy level
Electrons orbit the nucleus like planets around the sun
Small negative charges surrounded by a positively charged substance
16
What is the mass of a neutron?
no mass
1 amu
significantly less than 1 amu
2 amu
17
How do two positively charged objects interact with each other?
Strong attraction
Strong repulsion
Slight repulsion
Slight attraction
18
What is the mass of a calcium atom that contains 20 neutrons?
40.08 amu
40 amu
22 amu
20 amu
19
The law of definite proportions states that:
Compounds consist of elements in fixed ratios
Matter can be neither created nor destroyed
Atoms combine in simple whole number ratios
The number of atoms in system never changes
20
Where are neutrons located?
in the nucleus
outside the nucleus
21
True or false: isotopes of the same element have the same properties.
false
true
22
True or false: isotopes of the same element have the same number of protons.
false
true
23
What does the pre-fix "a-" mean? (as in, atom)
many
some
first
not
24
What did JJ Thomson base his theory of electrons on?
Ernest Rutherford
Law of Conservation of Mass
Gold Foil Experiment
Cathode ray tube experiments
25
True or false: isotopes of the same element have the same number of electrons when neutral.
false
true
26
What element is depicted in this picture of a neutral atom?
Beryllium
Boron
Carbon
Helium
27
What is the charge on a neutron?
negative 1
no charge
positive 1
it depends on how much energy it has
28
True or false: isotopes of the same element have the same number of neutrons.
true
false
29
What is the mass of a hydrogen atom that contains no neutrons?
all hydrogen atoms contain neutrons
2 amu
1 amu
0 amu
30
True or false: isotopes of the same element have the same atomic mass.
true
false
31
Pick the statement that best describes the Rutherford model of the atom.
Atoms as small, uniform spheres with hooks
Small negative charges surrounded by a positively charged substance
Dense, positive nucleus surrounded by negative charges
Plum Pudding Model
32
Element X has isotopes with masses of 24 and 25. If X's average mass is 24.3, which is true?
There must be a higher abundance of X-24 than X-25
X-26 must also exist
There must be a higher abundance of X-25 than X-24
X-23 must also exist
33
True or false: Dalton's theory of the atom described atoms as having charges
false
true
34
How many neutrons does helium-4 contain?
0
4
2
1
35
Who first proposed the concept of an atom?
Democritus and/or Leucippus
Ernest Rutherford
Antione Lavoisier
John Dalton
36
What experiment is depicted in this image?
Law of Conservation of Mass
Ernest Rutherford
Gold Foil Experiment
Cathode ray tube experiments
37
The law of conservation of matter states that:
Matter is anything that has mass and volume
In a chemical process, matter can be destroyed and created
The amount of matter in the universe is fixed
All atoms are indestructible
38
What does it mean for an objective to carry a positive charge?
It is made of electrons
It has no neutrons
It has more electrons than protons
It has more protons than electrons
39
How does a positively charged object interact with a neutral object?
Slight attraction
Strong attraction
Slight repulsion
Strong repulsion
40
True or false: Dalton described chemical reactions as the combining and separating of atoms
true
false
41
In Rutherford's gold foil experiment, which of the following occurred?
Most of the alpha particle were deflected slightly
Most alpha particles went straight through the foil
Most of the alpha particles bounced back
Some of the alpha particles hit Rutherford in the face
42
How many neutrons does carbon's most common isotope contain?
12
8
14
6
43
What is the charge on a proton?
no charge
positive 1
it depends on how much energy it has
negative 1
44
Element-54 is ~3x more abundant than Element-56. Which is closest to the average atomic mass?
56.895 amu
56.0 amu
54.003 amu
54.65 amu
45
What is the mass of an electron?
no mass
significantly less than 1 amu
1 amu
2 amu
