Brainscape's Knowledge GenomeTM

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


See full index

Honors Chemisty > Quiz 2 > Flashcards

Quiz 2 Flashcards

1
Q

The number of protons in an atom is equal to the number of ___

A

electrons

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

Who first characterized the electron?

A

J.J. Thomson

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

Where are electrons located in an atom?

A

electron cloud

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

Who first characterized the neutron?

A

James Chadwick

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

Who first characterized the nucleus of an atom?

A

Ernest Rutherford

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

Why does the nucleus of every atom have an overall positive charge?

A

protons have positive charge and neutrons are neutral

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

Why is almost all of the mass of an atom located in the nucleus?

A

protons and neutrons are 1837 and 1839 times heavier than electrons

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

What is a nucleon?

A

any subatomic particle found in the nucleus of an atom

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

Protons have a mass slightly _____ than a neutron.

A

less

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

The ____ is the most massive of all the particles

A

neutron

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

What does “charge neutrality” refer to?

A

the fact that atoms are electrically neutral

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

What are isotopes?

A

atoms of the same element that have the same number of protons and electrons, but different numbers of neutrons

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

What is the relationship between the atomic numbers and mass numbers of two atoms that are
isotopes of the same element?

A

Atoms of the same element will have the same number of protons and thus the same atomic
numbers. However, since isotopes of the same element have different numbers of neutrons, they
will have different mass numbers.

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

What does the atomic number refer to?

A

number of protons in the nucleus of an atom (also electrons since there are the same amount)

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

What does the mass number refer to?

A

total number of protons and neutrons in nucleus

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

Why do atoms that are isotopes of the same element usually have the same chemical behavior?

A

The chemical behavior of isotopes is usually the same because it is the electrons in the atom that
determine its chemical behavior and not the protons or neutrons.

17
Q

Atoms that are isotopes of the same element can have slightly different physical properties. Why is this?

A

Some physical properties, such as density, depend on the mass of the atoms that make up the
substance.

18
Q

How did the work of Henry Moseley change the way chemical elements were organized on the periodic table?

A

His work with X – rays showed that the elements should be listed in order of atomic number
rather than their atomic weights because his work revealed that the atomic number was actually
reflected in a physical property of every atom and that there was a steady increase in this property

19
Q

What property of an atom determines its identity as an element?

A

the number of protons in its nucleus

20
Q

How can the atomic number and mass number of an atom be used to determine the subatomic
particle inventory of that atom?

A

The atomic number can be used to indicate the number of protons present in the atom. (and electrons)

The number of neutrons in an atom can be determined by subtracting the number of protons
(described by the atomic number) from the total number of particles in the nucleus (the mass
number).

21
Q

What’s an isobar?

A

an atom that has the same mass number but different atomic number

22
Q

What did Leucippus contribute to the atomic model?

A

water is the universal element

23
Q

What did Democritus contribute to the atomic model?

A

air is the universal element

24
Q

What did Antoine Lavosier contribute to the atomic model?

A

Law of Conservation of Mass

25
Q

What did Joseph Louis Proust contribute to the atomic model?

A

Law of Definite Proportions

26
Q

What did John Dalton contribute to the atomic model?

A

reintroduced atomic theory

Law of Multiple Proportions

27
Q

What did JJ Thomson contribute to the atomic model?

A

electrons

sphere model proposed by John Dalton is wrong

28
Q

What did Ernest Rutherford contribute to the atomic model?

A

nucleus

29
Q

What did Neils Bohr contribute to the atomic model?

A

electrons travel around nucleus in orbits

30
Q

What did Louis de Brogile contribute to the atomic model?

A

all matter has a wave characteristic

31
Q

What did Erwin Schrodinger contribute to the atomic model?

A

doesn’t look like solar system

Honors Chemisty (13 decks)

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