Which atomic model states that it is impossible to know the exact location of electrons around the nucleus?

Answers

Answer 1

Answer: The correct answer is electron-cloud model. This model states that electrons don't go around in an eliptical way but rather completely erratically and uncontrolably and this is why it can't be known where they are or how they will behave. They form sort of like a cloud of many electrons that move erratically so you have to check it to see where it is.

Answer 2

Answer:

Answer:

Electron -cloud model

Explanation:

Edge 2021

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If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume isdecreased to 20.0 mL?
Which equation should you use?
V1 V2
T1 T2
P1V1 = P2V2
V1 V₂
N1 N2

Answers

Answer: P1V1 + P2V2

Explanation:

In the electron cloud model, electrons are said to be moving so fast that a person can _____.

Answers

Answer: Not determine their exact position.

Explanation: In the electron cloud model, electrons are said to be moving so fast that a person cannot determine their exact position.

This phenomenon goes well off with the Heisnberg Uncertainity Principle (HUP)which states that the momentum (Δm) and position (Δx) of an obejct cannot be determined simultaneously at the same time.

The mathematical relation of HUP is -

Δx Δm ≥ h/ 4π

where h = Planck's Constant

cannot describe their exact position.

Given the speed of light (3.00 × 108 m/s) and a wavelength 5.9 × 10-7 m, what is the frequency?

Answers

Wavelength x Frequency = Speed

So, 5.9 x 10^-7 x F = 3 x 10^8

Rearranging the equation, we get:
F = (3 x 10^8)/(5.9 x 10^-7) = 5.08 x 10^14 Hz

Hope I helped!! xx

What is the most polar?

A) C-N
B) C-O
C) C-C
D) C-Cl
E) C-F

Answers

I would say that the most polar is E) C-F, because polarity is proportional to the difference in electronegativity. Since carbon is the same in each molecule, you need to focus on non-carbon atom, which is the most polar.

Which list of radioisotopes contains an alpha emitter, a beta emitter, and a positron emitter?(1) C-14, N-16, P-32
(2) Cs-137, Fr-220, Tc-99
(3) Kr-85, Ne-19, Rn-222
(4) Pu-239, Th-232, U-238

Answers

Answer: The correct option is 3.

Explanation: Radioisotopes which emits alpha-particle are known as alpha-emitters. These radioisotopesundergo alpha-decay.

The radioisotopes which emits beta-particle $(_(-1)^0\beta )$ are known as beta-emitters. These radioisotopes undergo beta-minus decay. In this decay a neutron gets converted to a proton and an electron.

The radioisotopes which emits positron-particle $(_(+1)^0\beta )$ are known as positron-emitters. These radioisotopes undergo beta-plus decay. In this type of decay a proton gets converted to a neutron.

From the given options,

Option 1: All the three radioisotopes undergoes beta-minus decay.

Option 2: Cs-137 and Tc-99 radioisotopes undergo beta-minus decay.

Fr-220 is a radioisotope which undergoes alpha-decay.

Option 3: Radioisotope Kr-85 undergoes beta-minus decay.

$_(36)^(85)\textrm{Kr}\rightarrow _(37)^(85)\textrm{Rb}+_(-1)^0\beta$

Radioisotope Ne-19 undergoes positron decay.

$_(10)^(19)\textrm{Ne}\rightarrow _(9)^(19)\textrm{F}+_(+1)^0\beta$

Radioisotope Rn-222 undergoes alpha decay.

$_(86)^(222)\textrm{Rn}\rightarrow _(84)^(218)\textrm{Po}+_(2)^4\alpha$

Option 4: All the three radioisotopes undergoes beta-minus decay processes.

Hence, from the above information, the correct option is 3.

The answer is (3), they are β-, β+ and α decay mode. For (1), they are β-, β- and β- decay mode. For (2), they are β-, α and β-. For (4), they are α, α and α decay mode.

A hydrogen atom cannot emit an alpha particle true false

Answers

false.

Hope this helped. : )

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