In which orbitals would the valence electrons for selenium (Se) be placed?

2 answers:

8 0

Selenium falls in the same column with oxygen therefore it has the same number of valence electrons with oxygen which is 6. It fills the 3d orbital but only 4s and 4p are counted. The electronic configuration is [Ar]3d^10 4s^2.

elixir [45]3 years ago

8 0

Explanation:

Selenium has 6 valence electrons, two of which are placed in the S orbital and 4 of which are placed in the P orbital. In its electron structure, it is quite comparable to oxygen.

At the first energy level, the only orbital accessible to electrons is the 1s orbital, but at the next level, as well as a 2s orbital, there are 2p orbitals. A p orbital is formed like 2 identical balloons tied commonly at the nucleus. The orbital shows where there is a 95% chance of getting a critical electron.

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LiRa [457]

Explanation:

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Identify the major attractive force in HF molecules.A) London Dispersion Forces (LDFs)

Llana [10]

Answer:

C) hydrogen bonding

Explanation:

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3 years ago

How many grams of diphosphorus pentoxide result if 100.0 g of phosphorus are combined with sufficient oxygen?

gregori [183]

Answer is: 230 g.
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m(P₄) = 100 g.
M(P₄) = 4 · 31 g/mol = 124 g/mol.
n(P₄) = m(P₄) ÷ M(P₄) = 100g ÷ 124g/mol = 0,806 mol.
From reaction: n(P₄) : n(P₂O5) = 1 : 2.
n(P₂O₅) = 1,612 mol.
m(P₂O₅) = 1,612 mol · 142g/mol = 230g.
M - molar mass.
n - amount of substance.

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3 years ago

1. Is O2 a compound? Explain.

zhuklara [117]

1. O2 is not a compound because it only contains one or more type of the same element atom.
2. O2 is a molecule because a molecule is one or more of the same element atom.
3. The law of conversion is that the mass of the system will stay the same when transfer takes place. Like if you had an equation O+H2—> H2O the mass will remain the same.

4. It will be equal to 10 because of law of conservation of matter.

5. One observation can be that the compound, reaction you’re observing, has change states.

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3 years ago