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3 years ago

What experimental evidence leads scientists to believe that only quantized electronic energy states exist in atoms?

2 answers:

Elena-2011 [213]3 years ago

4 0

Bohr atomic model. The most important experiment in proving the theory of the amount of energy states in an atom was when Bohr tested the motion of the electron in the hydrogen atom which was not possible in Rutherford's previous experiment. Bohr's principles were: 1- Each electron has an amount of energy 2- Electrons have an orbit and the more energy farther from the nucleus 3- The more energy the more energy from the electron increases 4-Each electronic layer has a number and are represented by the letters K, L, M, N, O, P, Q.

MAXImum [283]3 years ago

3 0

Absorption and emmision spectrum experiment.

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In the equation Zn+2HCL ---->ZnCl2 + H 2 the reactants are

Oduvanchick [21]

Zn and HCl are the reactant in the equation above. zinc react with 2 moles of Hcl to form zinc chloride and a hydrogen molecule. The one equation means that the reaction proceed to the forward side only therefore no reverse of the reaction.

4 0

4 years ago

Provide an explanation at the subatomic level to explain why different colors are observed for different metal salts.

lakkis [162]

Answer:

When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.

Explanation:

8 0

4 years ago

Read 2 more answers

On the basis of molecular structure and bond polarity, which of the following compounds is most likely to have the greatest solu

Drupady [299]

Answer:

$\boxed{\text{c) NH$_{3}$; hydrogen bonding}}$

Explanation:

For each of these molecules, you must determine their VSEPR structure and then identify the strongest intermolecular forces.

Remember that water is a highly polar molecule.

a) CH₄

Electron geometry: tetrahedral

Molecular geometry: tetrahedral

Bond polarity: C-H bond nonpolar

Molecular polarity: nonpolar

Strongest IMF: London dispersion forces

Solubility in water: low

A nonpolar molecule is insoluble in a polar solvent.

b) CCl₄

Electron geometry: tetrahedral

Molecular geometry: tetrahedral

Bond polarity: C-Cl bond nonpolar

Molecular polarity: nonpolar (symmetrical molecule. All bond dipoles cancel)

Strongest IMF: London dispersion forces

Solubility in water: low

A nonpolar molecule is insoluble in a polar solvent.

d) PH₃

Electron geometry: tetrahedral

Molecular geometry: trigonal pyramidal

Bond polarity: P-H bonds are polar

Molecular polarity: polar (all P-H bond dipoles point towards P)

Strongest IMF: dipole-dipole

Solubility in water: soluble

A polar molecule is soluble in a polar solvent.

c) NH₃

Electron geometry: tetrahedral

Molecular geometry: trigonal pyramidal

Bond polarity: N-H bonds are highly polar

Molecular polarity: highly polar (all N-H bond dipoles point towards N)

Strongest IMF: hydrogen bonding

Solubility in water: highly soluble

NH₃ is so polar that it can form hydrogen bonds with water.

$\boxed{\textbf{The compound with the greatest solubility in water is NH$_{3}$}}$

8 0

3 years ago

Britta traveled 1250 km on her road trip and used 209 L of gasoline, filling her tank atan average of 1.14 euros per liter. Pier

icang [17]

Answer:

Britta paid more per kilometer driven

Explanation:

1) Britta:

Distance traveled: 1,250 Km

Gasoline used: 209 liter

Gasoline price: 1.23 euros / liter

Cost per km = total cost of gasoline / distance traveled

Cost per km = gasoline used × gasoline price / distance traveled

Cost per km = 209 liter × 1.14 (euro / liter) / 1,250 km = 0.19 euro / km

2) Pierce:

Distance traveled: 1,405 km

Gasoline used: 175 liter

Gasoline price = 1.23 euros / liter

Cost per km = 175 liter × 1.23 (euro / liter) / 1,405 km = 0.15 euro / km

3) Comparison:

0.19 > 0.15 ⇒ Britta paid more per kilometer driven

4 0

4 years ago

substance A is a nonpolar liquid and has only dispersion forces among its constituent particles. Substance B is also a nonpolar

MaRussiya [10]

Explanation:

The substance A and B will mix into one solution as it is a solvent interactions which is greater than or equal to the solute- solute and the solvent-solvent interactions. Thus when such interactions occurs, it is greater or equal to the some of the other two possible interactions. And here both have the same kind of interaction, and same magnitude, so they will makes to form a solution and mixes properly and spontaneously.

6 0

3 years ago