Which statements about the formation of the solar system are true and in a correct order? A.
A black hole collapsed to form the sun; small planetary objects formed; small planetary objects collided with each other to form larger objects.
B.
Most of the dust and gas contracted into a central mass—the Sun; half the mass of the cloud condensed to form Jupiter; asteroids and comets crashed into the sun to form the smaller planets.
C.
A spinning cloud of dust began to compress to form the sun; small planetary objects formed; hydrogen and helium became concentrated in the outer solar system to form the outer planets.
D.
Gravitational force held the newly formed planets around the sun; small planetary objects formed; hydrogen and helium became concentrated in the outer solar system to form the outer planets.
Answers
The statement about the formation of the solar system that are true and in a correct order are Gravitational force held the newly formed planets around the sun; small planetary objects formed; hydrogen and helium became concentrated in the outer solar system to form the outer planets. The answer is letter D.
Related Questions
On the basis of electronegativity, which pair of elements is most likely to form monatomic ions? responses a. Ba and O b. Cs and Rb c. O and F d. Na and K
Which of these following have a positive charges
A lahar is a type of mudflow that occurs?A. after a volcanic eruption B. before a hurricane make landfall. C. after a severe thunderstorm D. during a tornado
Given the balanced equation representing a reaction: 2na(s) + cl2(g) → 2nacl(s) + energy if 46 grams of na and 71 grams of cl2 react completely, what is the total mass of nacl produced? 1. 58.5 g 2. 117 g 3. 163 g 4. 234 g
2 - The nucleus of an atom is split apart.
3 - An atom gains an electron from another atom.
Which reaction(s) most likely release the greatest amount of energy?
1
2
1 and 3
2 and 3
Answers
Answer: Option (b) is the correct answer.
Explanation:
When an atom shares electrons with another atom then it results in the formation of covalent bond.
Whereas when an atom transfer electrons from one atom to another then it results in the formation of ionic bond.
When nucleus of an atom splits then it represents nuclear fission reaction and energy is released during this process.
For example,
Therefore, we can conclude that out of the given options, the nucleus of an atom is split apart most likely release the greatest amount of energy.
B) Mg with 14 neutrons
C) Fe with 26 neutrons
D) Ti with 26 neutrons
Answers
The correct answer is option B: Mg with 14 neutrons
The mass spectrum shows the charge to mass ratio of atoms. I can be used to sort the isotopes of an element.
Isotopy is a phenomenon in which atoms of the same element have the same atomic number but different mass numbers.
The mass spectrum of atoms separates atoms on the basis of charge to mass ratio of the isotopes.
The isotopes of magnesium are; 24Mg atom which has 12 neutrons 25Mg which has 13 neutrons, and 26Mg which has 14 neutrons.
Hence, the peak at 26amu represents 26Mg which has 14 neutrons.
Answer:
The answer is B
Answers
It can be a combustion reaction, or it can be a combination reaction
Answers
Answer:
Hygroscopic substances
Explanation:
Hygroscopic compounds are those that absorb moisture and a large amount of water and they become wet. They should not be confused with deliquescent substances that absorb water and forms solution.
Hygroscopic substances froms pasty substances and not solution while the liquid ones only becomes diluted. Examples are sodium trioxonitrate(v) (NaNO₃), copper (ii) oxide CuO, and concentrated tetraoxosulphate (vi) acid (H₂SO₄)
Final answer:
Hydrophilic substances, like cellulose found in cotton and paper pulp, can soak up large amounts of water. Some chemical compounds, such as sodiumcarbonate decahydrate and copper(II) sulfate pentahydrate, have this property. Moreover, phosphorus(V) oxide, although used for removing water from compounds, also shows a great affinity for water.
Explanation:
A compound that has the ability to soak up large amounts of water is termed a hydrophilic substance. Hydrophilic substances are attracted to water, absorbing it readily. For example, cotton and paper pulp, used in towels, are made of molecules of cellulose that contain many –OH groups.
Water molecules are attracted to these -OH groups and form hydrogen bonds with them, drawing large amounts of H₂O up the cellulose fibers. Additionally, some compounds like sodium carbonate decahydrate and copper(II) sulfate pentahydrate also have the ability to soak up water. Another example is phosphorus(V) oxide, which has a great affinity for water and is used for removing water from compounds.
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B. n=1 to n=6
C. n=1 to n=5
D. n=5 to n=1
Answers
Answer:
- Option A. n = 6 to n = 1
Explanation:
Niels Bohr was a Danish physicist who proposed the hydrogen atom quantum model to explain the discontinuity of the atom's emission spectra.
In Bohr hydrogen atom model, the electrons occupy orbits identified with the numbers n = 1, 2, 3, 4, ... Each number (orbit) corresponds to a different energy level or state. The number n = 1 corresponds to the lowest energy level, and each higher number corresponds to a higher energy level.
This table shows the relative energy of the different orbits of the Bhor hydrogen atom:
Orbit Quantum Energy Relative
number level energy
First n = 1 1 E₁
Second n = 2 2 2E₁
Third n = 3 3 9E₁
Fourth n = 4 4 16E₁
Fifth n = 5 5 25E₁
Sixth n = 6 6 36E₁
Seventh n = 7 7 49E₁
When an electron jumps from a higher energy state down to a lower energy state, it emits a photon with an energy equal to the difference of the energies between the initial and the final states.
Since the n = 6 to n = 1 transition results in the higher relative energy difference (36E₁ - E₁ = 35E₁), you conclude that it is this transition which results in the emission of the highest-energy photon, which is the option A.
Final answer:
In the Bohrhydrogen atom model, the highest energy photon is emitted during the transition from the highest energy level to the lowest energy level. For the given options, the highest energy photon would be emitted in the transition from n=6 to n=1.
Explanation:
In the Bohr hydrogen atom model, the highest energyphoton is emitted during the transition from the highest energy level to the lowest energy level. In our choices, the largest transition (indicating the greatest energy change) is from n=6 to n=1. This is because the energy difference between the energy levels is the greatest, resulting in the emission of a photon with the highest energy.
In general, the greater the transition between the energy levels in a hydrogen atom (i.e. the more levels the electron 'jumps' downward), the higher the energy of the emitted photon.
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