The next subatomic particle discovered. Proton, a

positive charge particle, fundamental constituent

What is the Heisenberg Principle?

Can never know momentum and position of the electron at the same time

Which of the following points from Dalton's atomic theory is incorrect?

All atoms of the same element have identical # of all particles.

Exposure to high concentration of radioactive isotopes can cause?

somatic damages and genetic mutations

Atomic Theory is the theory of what?

our evolution of the idea of the atom

How did Bohr modify Rutherford's model of the atom?

placed electrons in discrete energy levels

What did possibly killed the dinosaurs?

Iridium asteroid, detected by the isotope ratio

Electrons behave like harmonic oscilator. Erwin Shrodinger was able to calculate

The shapes of electronic orbits - probability shapes

What is special about Bohr's model?

It shows the arrangement of all the electrons in shells

Why the atomic mass at the bottom is not a whole number?

Because is equal to the weighted average mass of all isotopes

The Bohr model shows:

All of the atom's electrons in orbits

What did Clair Patterson find out?

The atmosphere was contaminated with lead from the 20’s gasoline

Which of the following statements supports the law of definite proportions?

Water, H2O is always 89% oxygen and 11% hydrogen.

According to Rutherford, where in the atom are electrons located?

in the empty space surrounding the atom

Why were some of the alpha particles able to pass through the foil?

because atoms are mostly empty space

The first person to suggest the idea of atoms was ________.

Democritus, the laughing philosopher

Why were some alpha particles deflected in the Rutherford experiment?

They were repelled by the positive nucleus.

They are the building blocks of matter of the visible Universe

One of the primary goals of ancient alchemists was to _______.

transform base metals into gold

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Atomic Theory

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atomic theory

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Questions 69

Answers

1
The next subatomic particle discovered. Proton, a
positive charge particle, fundamental constituent
something that is one and dose not come apart
an article of furniture consisting of a flat
distinguishes organisms from inorganic objects
2
I revived Democritus atomic theory! I am...
Neils Bohr
Tom Brady
John Dalton
Ice T
3
Atomic number of Na is 11. How many neutrons are in sodium-23?
23
23-11=12
11
14
4
A proton in the center has?
a neutral charge
no charge
a positive charge
a negative charge
5
Who developed the "planetary" model of the atom?
Dalton
Thomson
Bohr
Chadwick
6
Avogadro introduced the chemical package, the mole. What is the Avogadro constant for the # of atoms in one mole ?
6.20x10^23
6.23x10^20
6.03x10^23
6.022x1023
7
Dalton could not explain the existence of isotopes.
False
True
He tried
Maybe he could
8
What is the Heisenberg Principle?
Breaking Bad
Can never know momentum and position of the electron at the same time
People want to appear happy to the rest of the world.
Pinging subjects throughout the day.
9
What did Bohr discover about the atom?
Nucleus
Neutron
Proton
Electron Energy Levels
10
Which of the following points from Dalton's atomic theory is incorrect?
Atoms cannot be created or destroyed.
All matter is composed of atoms.
Atoms can be joined, separated, or rearraged in chemical reactions.
All atoms of the same element have identical # of all particles.
11
Exposure to high concentration of radioactive isotopes can cause?
somatic damages and genetic mutations
nothing
3rd degree burns
instant death
12
All ordinary matter is made out of atoms. True or false?
False
True
13
Which of the following isotopes represents an atom that has 17 protons and 20 neutrons?
35Cl
17Cl
37Ca
37Cl
14
What 2 subatomic particle(s) are located in the nucleus?
protons and electrons
protons only
protons and neutrons
electrons and neutrons
15
The smallest subatomic particle is the ______.
none of these; they are all the same size
electron
neutron
proton
16
Atomic Theory is the theory of what?
the evolution of the universe
our evolution of the idea of the atom
the evolution of species
the evolution of science
17
How did Bohr modify Rutherford's model of the atom?
discovered the atomic nucleus
proposed the electrons are located in the nucleus
placed electrons in discrete energy levels
added neutrons to the nucleus
18
What did possibly killed the dinosaurs?
Lead asteroid from Pluto
Radon from the Earth
Iridium asteroid, detected by the isotope ratio
Uranium asteroid from asteroid belt
19
The number of protons in the atom is the ____.
mass number
atomic number
isotope number
nuclear force
20
Electrons behave like harmonic oscilator. Erwin Shrodinger was able to calculate
The atomic number of an element
The number of electrons in an atom
The mass number of an element
The shapes of electronic orbits - probability shapes
21
The Greek word "atomos" means _______.
very small
inexisting
uncuttable
invisible
22
The law of conservation of mass was developed by _______.
Niels Bohr
Joseph Proust
John Dalton
Antoine Lavoisier
23
Same masses before and after a chemical reaction. The picture shown below represents which of the following concepts?
Law of multiple proportions
Dalton's atomic theory
Law of conservation of mass
Law of definite proportions
24
What is special about Bohr's model?
It portrays ionic bonds
It only shows the outer shell of an atom
It shows the arrangement of all the electrons in shells
It portrays covalent bonding
25
Atoms of the same element with different masses are called ____.
multiples
anions
isotopes
ions
26
Why the atomic mass at the bottom is not a whole number?
Because it is expressed in significant figures
Because it is random
Because is equal to the weighted average mass of all isotopes
Because it is not rounded
27
Which of the following symbols represents a phosphorus atom that has gained three electrons?
P+3
P+4
P-3
P
28
The Bohr model shows:
All of the valence electrons only
All of the atom's protons in orbits
All of the neutrons in orbits
All of the atom's electrons in orbits
29
How many neutrons are in a zinc-65 atom?
35
40
30
65
30
Use the periodic table. What is the atomic number of ²⁰⁷Pb with 125 neutrons?
82
207
84
125
31
What did Clair Patterson find out?
The oldest rock crystals are Zircons from Australia
The Rb-Sr radiometric technique is better than U-Pb
The atmosphere was contaminated with lead from the 20’s gasoline
Uranium leads to a fission chain reaction
32
Electrons were discovered by _______.
JJ Thomson
John Dalton
James Chadwick
Ernest Rutherford
33
Which of the following statements supports the law of definite proportions?
All matter is composed of atoms.
The mass of the reactants is always the same as the products
Water, H2O is always 89% oxygen and 11% hydrogen.
All atoms of the same element are identical.
34
How many electrons are in a Ca⁺² ion?
20
18
22
40
35
Mass number can be calculated by ____.
subtracting atomic number and protons
adding protons and electrons
subtracting atomic number and neutrons
adding protons and neutrons
36
According to Rutherford, where in the atom are electrons located?
in the nucleus
in circular orbits called electron shells
distributed evenly all throughout the atom
in the empty space surrounding the atom
37
What is the meaning of the top left number?
# Mass
# Protons
# Electrons
# Neutrons
38
Atoms are not uncuttable. Radioactive Isotopes...
All answers are correct
Have the change time equals a half life time
Spontaneously change into another isotope
Are unstable
39
Why were some of the alpha particles able to pass through the foil?
because atoms are mostly empty space
because neutrons are neutral
because they were positively charged
they were deflected by the nucleus
40
Energy produced by the splitting of uranium atoms...
fossil fuel energy
solar energy
nuclear energy
geothermal energy
41
All atoms from the periodic table have a _______ charge.
positive
negative
neutral
none of these
42
Isotopes of atoms that never fall apart are...
isotopes
unstable
ions
stable
43
What is the first element on the periodic table?
Oxygen
Lithium
Hydrogen
Helium
44
The first person to suggest the idea of atoms was ________.
an alchemist
Democritus, the laughing philosopher
Dalton
Aristotle
45
Why were some alpha particles deflected in the Rutherford experiment?
They could not pass through the atoms.
They were repelled by the positive nucleus.
Atoms are mostly empty space.
The electrons caused the particles to bounce back.
46
Electrons are carriers of
magnetism
none of these
fire
electricity, negative charge
47
The number of electrons determines ____.
All of the above
neutral atoms having the same number of protons and electrons
positive ions formed by losing electrons
negative ions formed by gaining electrons
48
What do atoms do?
Combine together to form molecules
Help you breath
They are the building blocks of matter of the visible Universe
Make up different motions
49
The last subatomic particle discovered:
The electrons in the nucleus
The cloud on the outside
The neutron in the Nucleus
The neutron on the outside
50
JJ Thomson. The picture below depicts the cathode-ray tube experiment that led to the discovery of _____.
the nucleus
electrons
neutrons
protons
51
One of the primary goals of ancient alchemists was to _______.
transform base metals into gold
transform a proton into a neutron
develop the law of conservation of mass
discover what atoms were made of
52
What contribution did Shrodinger and Heisenberg have to the atomic theory?
neutrons and protons will always be even in number.
electrons do not exist
electrons - no 100% predictable path; orbits-shapes based on probability.
Pluto is not a planet.
53
Isotopes occur when there are a different number of
Neutrons
Protons
Nuclei
Electrons
54
The number of protons in the atom defines the
neutral, cation or anion
mass number
atomic number
identity of the atoms and their elements
55
The number of neutrons in the atom defines if it is the
neutral, cation or anion
identity of the atoms
isotope - stable, unstable
atomic number
56
A ______ contains the Avogadro number of particles.
mole
ribosome
molecule
solution
57
Unstable isotopes are referred to as
radiosatellite
radiosourced
radiogenic
unstable!
58
James Chadwick made which of the following contributions to the atomic theory?
discovered electrons
discovered neutrons
discovered protons
discovered that atoms are neutral
59
Even though the Shrodinger atom is more correct we often use Bohr's model because:
It is prettier
It is easier to work with
It is made be a Nobel-winning scientist
It is an equal alternative
60
You know now all about...
Chemistry
Electrons
Atoms
Lavoisier
61
Cations are ____.
negative ions formed by gaining electrons
positive ions formed by losing electrons
positive ions formed by gaining electrons
negative ions formed by losing electrons
62
If atoms do not exist,
All of the above
There will be no ordinary matter
There will be no planets and people
The universe as we know it will stop existing
63
The Heisenberg Uncertainty Principle does NOT have to do with:
Position
Energy and speed
Momentum
Time
64
Use the periodic table. How many electrons are in an O^-2 ion?
10
6
-2
8
65
Anions are ____.
positive ions formed by gaining electrons
negative ions formed by losing electrons
positive ions formed by losing electrons
negative ions formed by gaining electrons
66
Neutrons have a ________ charge and are found _________.
negative, in the electron shells
neutral, in the nucleus
positive, in the nucleus
neutral, in the empty space around the nucleus
67
A scientific theory is...
a well-tested explanation that unifies many observations
a proposed explanation for an observation
the process of gathering information in a careful way
scientific principle that has no disproving data
68
Which is correct based on Dalton's Atomic Theory?
Each ion is made up of tiny particles called elements
Each atom is made up of tiny particles called elements
Each element is made up of tiny particles called atoms
Each atom is made up of tiny particles called ions
69
Protons are 11. How many electrons are in a neutral sodium atom?
13
23
12
11

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