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3 years ago

Which atom will have unpaired 3d electrons? Zn, Fe, Ca or Ge

Chemistry

1 answer:

Andrews [41]3 years ago

6 0

Explanation:

Only iron Fe has an atomic configuration in which the 3d electrons are unpaired.

Iron Fe : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²

The d-sublevel has five orbitals and has a capacity to accommodate 10 electrons with 2 electrons in each of the 5 d-orbital.

The electronic configuration of has a 3d⁶

Here instead of 10 electrons fully filling the d-orbitals, there are just 6 electrons.

According to Hund's rule of maximum multiplicity, electrons go into degenerate orbitals of sub-levels singly before pairing commences.

The first five electrons go into the d-orbitals singly first. The sixth electron will pair with the first orbital electron in d-orbital and the remaining four electrons are unpaired.

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Orbitals brainly.com/question/9514863

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Explain the difference between a theory and scientific law

Ksju [112]

Theory- <span>a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.

Scientific law- </span>a statement based on repeated experimental observations that describes some aspect of the universe.

8 0

3 years ago

Read 2 more answers

The air in a living room has a mass of 60 Kg and a specific heat of 1,020 J/kg°C. What is the change in thermal energy of the ai

arlik [135]

Answer:

Q = 306 kJ

Explanation:

Given that,

Mass, m = 60 kg

Specific heat, c = 1020 J/kg°C

The temperature changes from 20°C to 25°C.

Let Q be the change in thermal energy. The formula for the heat released is given by :

$Q=mc\Delta T$

Put all the values,

$Q=60\times 1020\times (25-20)\\\\Q=306000\ J\\\\or\\\\Q=306\ kJ$

So, 306 kJ is the change in thermal energy.

4 0

3 years ago

A. In the complete reaction of 22.99 g of sodium

fenix001 [56]

Answer : 58.44 g

<h3>Further explanation</h3>

The reaction

$\tt Na+Cl\Rightarrow NaCl$

mole ratio :

Na : Cl : NaCl = 1 : 1 : 1

Molar mass of Na : 22,989769 g/mol = 22.99 g/mol

Molar mass of Cl : 35,453 g/mol= 35.45 g/mol

Molar mass of NaCl : 58,44 g/mol

Let's check the mol for reactant (Na and Cl) and product(NaCl)

mol of Na :

$\tt mol=\dfrac{22.99}{22.99}=1$

mol of Cl :

$\tt mol=\dfrac{35.45}{35.45}=1$

Then the reactants are completed reacting because it matches the mole ratio, which is 1: 1

so that the mole of the product can be determined from the mol Na or Cl, which is 1

mass of NaCl :

$\tt =\dfrac{mol~NaCl}{mol~Na}\times MW~NaCl\\\\=\dfrac{1}{1}\times 58.44\\\\=\boxed{\bold{58.44~g}}$

3 0

4 years ago

Certain gases in the atmosphere trap heat on Earth.

ValentinkaMS [17]

Answer:

Greenhouse

Explanation:

4 0

3 years ago

Is cyclopentane an isomer of pentane? Explain.

Georgia [21]

Cyclopentane is NOT an isomer of pentane.

Isomers must have the same molecular formula.

The molecular formula of pentane is C₅H₁₂, while the molecular formula of cyclopentane is C₅H₁₀.

The two molecules cannot be isomers.

8 0

4 years ago