Question

Thompson's Plum Pudding model allowed scientists studying the atom to do which of the following

Answer 1

Question 1
0 out of 1 points
Incorrect
[02.01]

In the 1800s, John Dalton's atomic theory was that atoms are indivisible. Later, subatomic particles such as neutrons, electrons and protons were discovered. What happened to the indivisible part of Dalton's atomic theory and why? (1 point)
Selected Answer:
Incorrect The theory remained unchanged because Dalton was correct regarding all other statements within the accepted scientific theory.
Answers:
The theory remained unchanged because Dalton was correct regarding all other statements within the accepted scientific theory.
Dalton's theory remained intact and the new evidence was ultimately discarded because new data must fit within the current accepted theory.
The indivisible part of the theory was voted upon by the scientific community because validity is based on the majority of scientific opinions.
Correct The indivisible part of the theory was discarded after the subatomic particles discovery because consensus of data must exist for theories to be valid.
Question 2
1 out of 1 points
Correct
[02.01]

Why do scientists need scientific models? (1 point)
Selected Answer:
Correct They can often be used to make predictions.
Answers:
Correct They can often be used to make predictions.
Once established, they become fairly rigid and rarely change over time.
They exactly present the scientific principle being demonstrated.
They are typically based on mathematical explanations.
Question 3
0 out of 1 points
Incorrect
[02.01]

Thompson's Plum Pudding model allowed scientists studying the atom to do which of the following: (1 point)
Selected Answer:
Incorrect increase interest and funding in atomic theory.
Answers:
Correct analyze and test Thompson's findings.
create an image that could be used in schools.
increase interest and funding in atomic theory.
disperse the information more quickly to the public.
Question 4
0 out of 1 points
Incorrect
[02.01]

Earthquakes can range in strength from very mild to catastrophic. Why would a scientific model that simulates seismic activity and the consequences be beneficial? (1 point)
Selected Answer:
Incorrect It would reveal the epicenter of earthquakes.
Answers:
It would reveal the epicenter of earthquakes.
It would reduce or prevent earthquake activity.
Correct It would guide city planning and minimize damage.
It would warn of earthquake activity so people could evacuate.
Question 5
0 out of 1 points
Incorrect
[02.01]

Models have been created that predict world sea levels will rise if the current global temperature increases continue. If these models are correct, which of the following could be correctly inferred? (1 point)
Selected Answer:
Incorrect Deforestation continues to cause global warming.
Answers:
Correct The amount of land area will decrease.
Fossil fuels will rapidly become depleted.
Alternative energy sources will not meet demand.
Deforestation continues to cause global warming.
Question 6
0 out of 1 points
Incorrect
[02.01]

Why are computer models useful in studying phenomena in the universe? (1 point)
Selected Answer:
Incorrect Models are more reliable and more trustworthy than studying natural phenomena.
Answers:
Correct Models can study phenomena that would be impossible to study any other way.
Models can automatically change data if the data does not match observations.
Models are more reliable and more trustworthy than studying natural phenomena.
Models are more costly but consequently have more credibility and validity.
Question 7
0 out of 1 points
Incorrect
[02.01]

Which answer best explains why weather models will continue to improve? (1 point)
Selected Answer:
Incorrect Funding for research will continue to be available.
Answers:
Weather events will continue to become more deadly.
Funding for research will continue to be available.
Society is dissatisfied with the current weather models.
Correct Scientists continue to find new information and better technology.
Question 8
1 out of 1 points
Correct
[02.01]

J.J. Thompson's experiments led to the discovery of negatively charged particles. What were the negatively charged particles that Thompson discovered? (1 point)
Selected Answer:
Correct electrons
Answers:
Correct electrons
ions
neutrons
protons
Question 9
0 out of 1 points
Incorrect
[02.01]

What conclusion could Thompson make from his cathode ray experiment? (1 point)
Selected Answer:
Incorrect Cathode rays are positively charged.
Answers:
Cathode rays are neutral.
Correct Cathode rays are electrons.
Cathode rays are positively charged.
Cathode rays are oppositely charged.
Question 10
0 out of 1 points
Incorrect
[02.01]

In Rutherford's gold foil experiment, what caused the deflection of the positively charged particles? (1 point)
Selected Answer:
Incorrect neutrons
Answers:
electrons
ions
Correct protons
neutrons
Question 11
1 out of 1 points
Correct
[02.01]

How are theories supported in the scientific community? (1 point)
Selected Answer:
Correct They are tested by many scientists.
Answers:
They are treated as hypotheses.
Correct They are tested by many scientists.
They are unproven but accepted as fact.
They are rarely altered after publication.
Question 12
1 out of 1 points
Correct
[02.01]

John Dalton's atomic theory is considered to be the first truly scientific theory of the atom. What aspect of Dalton's research was missing from early theories? (1 point)
Selected Answer:
Correct experimentation and examination of the results
Answers:
Correct experimentation and examination of the results
effective technology in the form of microscopes
appropriate mathematical formulas for testing
a community of scientists capable of reviewing his work
Question 13
1 out of 1 points
Correct
[02.02]

Part of 19th century chemist John Dalton's Atomic Theory was that different elements differ in their physical and chemical properties. Which substance in an atom determines its chemical properties and allows elements to form chemical bonds? (1 point)
Selected Answer:
Correct electrons
Answers:
neutrons
atomic mass
Correct electrons
isotope
Question 14
1 out of 1 points
Correct
[02.02]

Which subatomic particles exist in orbital energy levels, or shells? (1 point)
Selected Answer:
Correct electrons
Answers:
Correct electrons
ions
protons
neutrons
Question 15
1 out of 1 points
Correct
[02.02]

The atomic number of sodium (Na) is 11. This is also the number of which of the following? (1 point)
Selected Answer:
Correct protons
Answers:
atomic mass
ionic charge
neutrons
Correct protons
Question 16
1 out of 1 points
Correct
[02.02]

A neutron has a relative mass of 1.675 x 10-24 grams. Which of the following particles has the same relative mass? (1 point)
Selected Answer:
Correct proton
Answers:
atom
element
electron
Correct proton
Question 17
0 out of 1 points
Incorrect
[02.02]

The atomic mass of potassium (K) and has a mass number of 39. The atomic number of potassium is 19. How many neutrons are in potassium? (1 point)
Selected Answer:
Incorrect 19
Answers:
19
Correct 20
39
58
Question 18
0 out of 1 points
Incorrect
[02.03]

What determines the mass number of an element? (1 point)
Selected Answer:
Incorrect the number of protons?
Answers:
the number of protons?
Correct the total number of neutrons and protons
the number of protons minus the number of electrons
the total number of protons, electrons, and neutrons
Question 19
0 out of 1 points
Incorrect
[02.03]

During the fission of uranium-235, neutrons are released and a small amount of mass is converted to energy. How many neutrons are in the nucleus of an atom of uranium-235? (1 point)

A box from the periodic table with the word uranium at the top, the number 92 under the word uranium, the capital letter U in t
Selected Answer:
Incorrect 92
Answers:
92
Correct 143
235
238
Question 20
0 out of 1 points
Incorrect
[02.02, 02.03]

Which of the following is the symbol for an atom with 23 protons and 28 neutrons? (1 point)
Selected Answer:
Incorrect Ni and to the left is the superscript number 23 and the subscript number 28.
Answers:
B and to the left is the superscript number 23 and the subscript number 5.
Ni and to the left is the superscript number 23 and the subscript number 28.
Sb and to the left is the superscript number 51 and the subscript number 21.
Correct V and to the left is the superscript number 51 and the subscript number 23.
Question 21
1 out of 1 points
Correct
[02.03]

Iridium has two naturally occurring isotopes. Iridium-191 has a mass of 190.96 and a relative abundance of 37.3%. Iridium-193 has a mass of 192.96 and a relative abundance of 62.7%. What is the weighted average atomic mass of iridium? (1 point)
Selected Answer:
Correct 192.21 g/mol
Answers:
191.71 g/mol
191.96 g/mol
192.00 g/mol
Correct 192.21 g/mol
Question 22
1 out of 1 points
Correct
[02.03]

Gallium has a weighted average atomic mass of 69.7 and two naturally occurring isotopes: gallium-69 and gallium-71. Gallium-69 has a relative abundance of 60.1% and a mass of 68.9. The relative abundance of gallium-71 is 39.9%. Based on this information, what is the mass of gallium-71? (1 point)
Selected Answer:
Correct 70.9 g/mol
Answers:
71.1 g/mol
71.0 g/mol
Correct 70.9 g/mol
70.8 g/mol
Question 23
1 out of 1 points
Correct
[02.04]

The molar mass of phosphorus is equal to the mass of 6.02 x 1023 atoms of phosphorus. What is the molar mass of phosphorus, in g/mol? (1 point)
Selected Answer:
Correct 30.97
Answers:
5.14
Correct 30.97
45.97
90.33
Question 24
0 out of 1 points
Incorrect
[02.04]

A platinum wedding band contains 0.077 mol of platinum. How many atoms of platinum are in the 15-gram platinum wedding band? (1 point)
Selected Answer:
Incorrect 3.09 x 1021 atoms
Answers:
3.09 x 1021 atoms
Correct 4.64 x 1022 atoms
7.82 x 1024 atoms
1.17 x 1026 atoms
Question 25
1 out of 1 points
Correct
[02.04]

If a sample of pure sodium has a mass of 8.2 grams and sodium has an average atomic mass of 22.99 g/mol, how many sodium atoms are there in the sample? (1 point)
Selected Answer:
Correct 2.15 x 1023 atoms
Answers:
3.21 x 1021 atoms
Correct 2.15 x 1023 atoms
1.69 x 1024 atoms
1.13 x 1026 atoms
Question 26
1 out of 1 points
Correct
[02.04]

A laboratory has a 2.0-mol sample of pure selenium and a 2.0-mol sample of pure chromium. How many more grams of selenium than chromium does this represent? (1 point)
Selected Answer:
Correct 53.9 g
Answers:
65.5 g
Correct 53.9 g
27.0 g
13.5 g
Question 27
1 out of 1 points
Correct
[02.04]

Neon has an average atomic mass of 20.2 g/mol, whereas argon has an average atomic mass of 40.0 g/mol. How would the number of atoms in a 1.0 mol sample of neon compare to the number of atoms in a 4.0 mol sample of argon? (1 point)
Selected Answer:
Correct The argon sample would have 4 times as many atoms as the neon sample.
Answers:
The argon sample would have the same number of atoms as the neon sample.
The argon sample would have twice as many atoms as the neon sample.
Correct The argon sample would have 4 times as many atoms as the neon sample.
The argon sample would have 8 times as many atoms as the neon sample.
Question 28
1 out of 1 points
Correct
[02.06]

How many electrons would be represented in the Lewis Dot Notation for an atom of oxygen? (1 point)
Selected Answer:
Correct 6
Answers:
2
Correct 6
8
18
Question 29
0 out of 1 points
Incorrect
[02.06]

How many valence electrons are found in one atom of chlorine? (1 point)
Selected Answer:
Incorrect 2
Answers:
2
5
Correct 7
17
Question 30
1 out of 1 points
Correct
[02.06]

Neon is an inert gas and has the atomic number of 10. Which of the following correctly depicts its electron configuration? (1 point)
Selected Answer:
Correct 1s2s22p6
Answers:
1s22d8
1s22s43p4
Correct 1s2s22p6
1s22s23p44d2
Question 31
1 out of 1 points
Correct
[02.06]

What is released in the process of an atom decaying from an excited level to a lower energy level? (1 point)
Selected Answer:
Correct a photon
Answers:
Correct a photon
an electron
an ion
a proton
Question 32
1 out of 1 points
Correct
[02.06]

When electrons are in an unstable state, they will quickly return to their lower energy level. When this happens, energy will be released. What conditions are the electrons in before this energy is released? (1 point)
Selected Answer:
Correct excited state
Answers:
electromagnetic
Correct excited state
ground state
quantized

Answer 2

are you serious

Answer 3

lmao