Which scientist's atomic model is most recent?
A. Dalton's
B. Rutherford's
O c. Thomson's
D. Bohr's
Answers
Answer:
D. Bohr's
Explanation:
I just did the test, and got it right! Hope this helps.
It was Niels Bohr who discovered the modern atomic model. This model revealed the revolution of electrons and determination of energy levels and momentum of electrons. Hence, option D is correct.
What was atomic model?Various atomic models discussed about the structure and electronic properties of atom. It was Dalton who found that atom is indivisible and combination of atoms make a compound.
Later J.J . Thomson discovered electrons the subatomic particles. But this model does not found the orbitals for electrons and energy levels. Rutherford proposed then the nuclear model of atom.
Nuclear model of atom described that the nucleus contains the positively charged particles protons and the negatively charged particles electrons are revolving around the nucleus.
Later Bohr explained the revolution of electrons around the nucleus with the aid of quantum mechanics and he found that the electrons revolves through a circular paths of fixed energy. By this model momentum and energy of electrons can be calculated.
Hence, Bohr's model is most recent.
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Related Questions
brain break riddle!
what has a head and a tail, but no legs?
Answers
Answer:
a tadpole
Explanation:
Answer:
a coin
Explanation:
heads and tails no legs
Do you think prevailing winds can affect climate zone distribution? Explain your reasoning with evidence
Answers
Answer:
Prevailing winds are the result of atmospheric circulation cells. They influence the climate of a region. Rising and sinking air can influence the precipitation of a region. Atmospheric circulation cells create the general climate of a region.
Explanation:
Which of the following is a biotic factor in a biome?
a
kinds of birds
b
amount of rainfall
c
types of rocks
Answers
Answer:
i guss c is answer in my ......
Answer:
a kind of birds is a biotic factor
can you help me understand this ? I completely dont understand it . i know the tire will burst.
Answers
Answer:
There is only one formula to use and we should assume ideal gas. This equation is: PV=nRT. For the following questions manipulate this equation to get the answer.
1. n = PV/RT = (249*1000 Pa)(15.6 L)(1 m^3/1000 L)/(8.314 Pa-m^3/mol-K))(21+273) = 1.59 mol
2. P = nRT/V = (1.59)(8.314)(51+273)/(15.6/1000)(1000) = 274.55 kPa
3. Since the answer in #2 is more than 269 kPa, then the tires will likely burst. 4. Reduce pressure way below the limit 269 kPa.
Explanation:
Answer:
There is only one formula to use and we should assume ideal gas. This equation is: PV=nRT. For the following questions manipulate this equation to get the answer.
1. n = PV/RT = (249*1000 Pa)(15.6 L)(1 m^3/1000 L)/(8.314 Pa-m^3/mol-K))(21+273) = 1.59 mol
2. P = nRT/V = (1.59)(8.314)(51+273)/(15.6/1000)(1000) = 274.55 kPa
3. Since the answer in #2 is more than 269 kPa, then the tires will likely burst. 4. Reduce pressure way below the limit 269 kPa.
Explanation:
Why are cellular respiration and photosynthesis opposite processes?
This is in science for 7th grade
Answers
Answer:
photosynthesis removes carbon dioxide from the atmosphere while respiration puts back carbon dioxide.
Explanation:
hope this helps
Science Tectonic Plates Cause and Effect (Converge, Diverge and Transform)
Answers
•Deep ocean trenches
• volcanoes
• mountains
• earthquakes
When divergent occurs:
• new oceanic crust forms
• submarine mountain range
• volcanoes
• earthquakes
When transform occurs:
• faults
• earthquakes
• linear valleys
• stream beds split in half
I WILL GIVE YOU BRAINLIST PLS DOOOOOO
Which of these is a characteristic of index fossils?
Found in the topmost rock layer
Found in many layers of the same rock
Have already established relative age
Are limited to a particular geographic location
Answers
Answer: It is the third one.
Explanation:
An index fossil is something that a human can estimate the age of the fossil by looking at it.
Index fossils are distinct in nature and recognisable. It is also widely present across the world. It is abundant and found everywhere.
How do the properties of each of these materials vary? Paper and Cardboard, Plastic, Wood, Metals
PLEASE HELP NOW
Answers
The properties of all of these material vary from each other. Paper, cardboard and plastic are insulators and metals and conductors. Each of them has different physical properties.
What are physical properties ?The physical properties of a substance include properties which changes its physical structure, size, shape, phase etc. Solubility, conductivity, resistance etc. are also physical properties.
Here, paper, cupboard and plastic are insulators and they does not conduct electricity. Whereas, metals are very good conductors and they have wide range of applications in optoelectronic devices.
Each of these materials has different melting temperature and different uses. Their density also vary significantly. The paper is the less dense one here and metals are denser.
The applications of these materials are based on their physical properties.
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Which statement describes what is gained or lost during radioactive decay?
Atoms gain other atoms.
Elements take in energy.
Atoms lose smaller particles.
Elements gain smaller particles.
only one answer
Answers
Answer:
The answer is
Atoms gain other atoms
Hope this helps you
Answer:
AAAAAAAAAAAA!!!!!!!
Explanation:
Every few years, winds stop blowing for months at a time causing the ocean currents to slow down, and causing the nutrient-rich deep ocean cold water that usually wells up to slow down. As a result, fishermen off the coast of South America catch fewer fish during this phenomenon. What is this phenomenon called?
A. El Gulf Stream
B. La Ms. Shamsi
C. El Nina
D. El Nino
Answers
Answer:
D. El Nino
Explanation:
a warming of the ocean surface or above average sea surface temperature’s in the central and eastern tropical Pacific Ocean. Basically when warmer than average water temp develop on the pacific.
What needed to be present in marine mud to form fossil fuels?
Answers
Carbon and Hydrogen.
Answer:
Mostly decaying organisms are needed to present in marine mud to form fossil fuels.
Explanation: When organisms and plants died and sank to the bottom of swamps and oceans, brown soil-like materials called peat are formed. Over millions of years, the peat became covered with sand, clay and other minerals and the peat is converted into layers of sedimentary rocks. After a long time, different type of fossil fuels are formed.
What is the volume of a shipping crate that is 2 meters long, 3 meters wide, and 4 meters high?
A.9 m3
B.10 m3
C.20 m3
D.24 m3
Answers
Answer:
I think A 9 m3, sorry if I'm wrong
What is the charge on the Cr in Cr2O72-
Answers
Answer:
+6.
Explanation:
So, a chromium atom here has an oxidation number of +6.
The speed at which a nitrogen molecule’s particles are moving increases. What will happen to the thermal energy of this molecule?
A) The thermal energy of the molecule will increase.
B) The thermal energy of the molecule will not change, but its mass will change.
C) The thermal energy of the molecule will not change, and its mass will remain the same.
D) The thermal energy of the molecule will decrease.
Answers
Answer
The thermal energy of the molecule will increase.
Explanation:
Increasing the speed at which the particles are moving cause atoms and molecules to move faster and collide with each other. This increases the thermal energy.
An ionic bond involves the
Answers
Answer: Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities, and is the primary interaction occurring in ionic compounds.
Explanation:
Keesha performed a chemical reaction and the products looked quite different from the reactants. She knew the amount of matter had not changed due to the law of conservation of mass. According to the law of conservation of mass, what happens in a chemical reaction?
Answers
Answer:
matter can't change, but mass can differ
Explanation:
so i don't know what the answer would be so have fun with this
Answer:
matter is not created or destoryed and the amount of mass may change after the reation
hope this helps
Explanation:
?What statement best describes the arrangement of the atoms in an ethylene molecule?
Answers
whos good at the periodic table cus im not help
Answers
Atoms are made up of atomic particles. Which of the following is not an atomic A.particle
B.electrons
C.neutrons
D.molecules
E.protons
Answers
Answer:
D
Explanation:
san atom is made of electrons, protons and neutrons
Answer:molecules
Explanation:
Write a summary of what you have learned about how incoming forces and outgoing forces are related (newton's cradle)
Answers
The relationship between incoming and outgoing forces in Newton's Cradle can be understood through the following concepts:
Conservation of Momentum: In a closed system with no external forces, the total momentum before a collision is equal to the total momentum after the collision. In Newton's Cradle, the momentum of the incoming ball is transferred through the stationary balls and eventually to the last ball, which swings outward with a momentum equal to the initial ball's momentum.
Conservation of Energy: Similarly, the total mechanical energy (kinetic and potential) in a closed system remains constant. In the context of Newton's Cradle, the kinetic energy of the incoming ball is transferred through the stationary balls, and eventually to the last ball, which swings outward with kinetic energy equal to that of the incoming ball. Potential energy is also involved as the balls swing and momentarily come to rest at their highest points.
Elastic Collisions: Newton's Cradle demonstrates nearly perfect elastic collisions, wherein both momentum and kinetic energy are conserved. In reality, some energy is lost to heat and sound, making the collisions slightly inelastic. However, the demonstration is still a useful approximation for understanding the transfer of forces.
Force Transfer: The incoming force exerted by the first ball is transmitted through the intervening balls to the last ball without causing any significant movement of the middle balls. This occurs because the balls are very close together and the time taken for the force to be transferred is minimal, allowing the middle balls to remain nearly stationary.
In summary, Newton's Cradle demonstrates the relationship between incoming and outgoing forces through the principles of conservation of momentum and energy, elastic collisions, and force transfer. The device provides a clear visual representation of these fundamental concepts in physics.
What does n equal for one shell ...... Hiiiiiiiiiiiiiiiiii
A. 2
B.8
C.14
Answers
Answer:
B
Explanation:
the equal of the shell is b
Please help me por favor :'(
Answers
Figure A and Figure B are built with unit cubes of the same size. Explain how to use the volume of Figure A to find the volume of Figure B.
Answers
What happens when a cold drink sits in a hot room?
A.It remains cold incorrect answer
B.It gets warmer incorrect answer
C.It starts boiling incorrect answer
D.It starts freezing incorrect answer
Answers
Answer:b it gets warmer
Explanation: from the surface of the object holding the drink then transfers through the liquid by convection. ... This causes the molecules in the food to vibrate rapidly and produce thermal energy (heat)
Option B is correct
When a cold drink sits in a hot room, it gets warmer
Convection is the transfer of heat energy as a result of molecular movement through a fluid.
When a cold drink sits in a hot room:
Heat energy is transferred from the room to the drink
The temperature of the cold drink reduces
The cold drink becomes warmer due to the heat energy received from the cold room
Therefore:
When a cold drink sits in a hot room, it gets warmer
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2 QUESTIONS: ANSWER THIS with a proper answer plz. PLZ DO NOT ANSWER JUST FOR MY BRAINLY POINTS!!!!
15. For elements 1-36, there are two exceptions to the filling order as predicted from the periodic table. Draw the atomic orbital diagrams for the two exceptions and indicate how many unpaired electrons are present.
16. The elements Si, Ga, As, Ge, Al, Cd, S, and Se are all used in the manufacture of various semiconductor devices. Write the expected electron configuration for these atoms.
Answers
Answer:
Si hay algo que sucedió entre ustedes raro o un comportamiento que tuviste con esa persona o que te vio hacer asi como le pudieron decir algo de ti que no le gustara a tu amigo hace que se comporte raro contigo
Explanation:
I just need help all I need is the answer please some one
Answers
Answer: The correct fill-in-the-blank answers are:
1. through binary fission (already filled in)
2. be resistant to penicillin
3. through asexual reproduction.
4. cell replicates before
5. a simpler process
Explanation:
The correct fill-in-the-blank answers are:
1. Bacteria reproduce through binary fission (already filled in)
2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin
3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.
4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.
5. Asexual reproduction is a simpler process than sexual reproduction.
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Match these items.
1. imprint of plant or animal
original-remains fossil
2. undecayed plant or animal part
carbonized fossil
3. replaced by a mineral
petrified fossil
4. only carbon remains
cleavage
5. mountain
geology
6. from magma
metamorphic
7. from physical and chemical changes
igneous
8. sandstone
print fossil
9. helps identify rocks
landform
10. science of Earth
sedimentary
Answers
1. print fossil
2. carbonized fossil
3. petrified fossil
4. cleavage
5. landform
6. igneous
7. metamorphic
8. print fossil
9. geology
10. sedimentary
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The print fossil, original-remains fossil, petrified fossil, carbonized fossil, landform, igneous, metamorphic, sedimentary, cleavage, and geology are the respective matches as given in the question.
Print fossil is imprint of plant or animal and basically known as fossil impression. Original-remains fossil comprises of the original tissues and parts of organism and undecayed plant or animal part. Petrified fossil is replaced by a mineral. Carbonized fossil is only carbon remains. Landform is a mountain. Igneous is from magma.
Metamorphic is from physical and chemical changes. Sedimentary rocks are sandstone. Cleavage helps to identify rocks. Geology is the study of science of earth.
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What is common among elements in the same group?
Answers
Answer:elements are arranged in increasing atomic number from left to right
Explanation:
Answer:elements are arranged in increasing
atomic number from left to right
explain how deep ocean currents form.
Answers
Answer:
Deep ocean currents (also known as Thermohaline Circulation) are caused by: The sinking and transport of large masses of cool water gives rise to the thermohaline circulation, which is driven by density gradients due to variations in temperature and salinity. The earth's rotation also influences deep ocean currents.
A pure substance is a single kind of matter. ----------------------- A(n)
is made up of two or more substances that are together in the same place, but each substance keeps its own properties.
Answers
Answer:21
Explanation: