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2 years ago

What is the basis for exceptions to the aufbau principle

2 answers:

3 0

With every electron stationed in its own orbital or paired off with each other in the higher energy level, the energy level is balanced and stable. The atoms that utilize this exception are Molybdenum, Chromium, Gold, Silver, and Copper.

densk [106]2 years ago

3 0

Answer:

Explanation:

This principles determines the manner in which atomic orbitals of an element filled with electrons. According to the principle, orbitals are filled by electrons on the basis of increasing order of orbital energy level. It can be used to determine the location of electrons in an atom.

However, chromium, silver, etc. are the exception because of the increased stability provided by the half-filled or filled sub-shells and also due to the presence of energy gap between the sub-shells.

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PilotLPTM [1.2K]

Answer:

i dont know i do this for points

Explanation:

4 0

2 years ago

When a compound donates (loses) electrons, that compound becomes oxidized. Such a compound is often referred to as an electron d

rjkz [21]

Assuming this is a true or false question, the answer would be True

3 0

2 years ago

Unlike an acid, an aqueous solution of a base

HACTEHA [7]

Answer:

D) contains more OH– ions than H+ ions

Explanation:

THESE ARE THE OPTIONS FOR THE QUESTION

A) causes some indicators to change color B) conducts electricity C) contains more H+ ions than OH– ions D) contains more OH– ions than H+ ions

Base can be regarded as substance which can dissociates in water then form hydroxide ions (OH–) .

Bases can be regarded as compounds which break into hydroxide ions I.e (OH-) with more other compounds if put in an aqueous solution. Hence it contains more OH– ions

3 0

2 years ago

4Fe +302–> 2Fe2O3 how many moles of Fe2O3 are produced when 0.27 moles of Fe is reacted?

Svet_ta [14]

Answer:

0.14 moles of Fe₂O₃

Explanation:

Given parameters:

Number of moles of Fe = 0.27moles

Unknown:

Number of moles of Fe₂O₃ = ?

Solution:

To solve this problem, we are going to the work from the known specie to the unknown using their number of moles.

We first obtain the balanced equation of the reaction;

4Fe + 3O₂ → 2Fe₂O₃

The equation above is balanced;

4 moles of Fe produced 2 moles of Fe₂O₃

0.27 moles of Fe will produce $\frac{0.27 x 2}{4}$ = 0.14 moles of Fe₂O₃

4 0

3 years ago

Which notation designates a possible value for a principal energy level in an atom?

Nata [24]

Answer:

Explanation:

There are four quantum numbers:

Principal quantum number (n)

Azimuthal quantum number (l)

Magnetic quantum number (ml)

Principal quantum number (n)

It tell about the energy levels. It is designated by n.

For example,

If n =2

It means there are two energy level present.

Azimuthal quantum number (l)

The azimuthal quantum number describe the shape of orbitals. Its value for s, p, d, f... are 0, 1, 2, 3. For l=3

(n-1)

4-1 = 3

it means principle quantum is 4 and electron is present in f subshell.

Magnetic quantum number (ml)

It describe the orientation of orbitals. Its values are -l to +l. For l=3 the ml will be -3 -2 -1 0 +1 +2 +3.

Spin quantum number (ms)

The spin quantum number tells the spin of electron either its clock wise (+1/2) or anti clock wise (-1/2).

If the electron is added in full empty orbital its spin will be +1/2 because it occupy full empty. If electron is already present and another electron is added then its spin will be -1/2.

3 0

2 years ago