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3 years ago

21. Which energy level has the lowest amount of energy?

Chemistry

2 answers:

Alex Ar [27]3 years ago

8 0

C is the right answer

Nikitich [7]3 years ago

7 0

Answer:

<u>ground state</u>

Explanation:

The lowest energy level of a system is called its ground state; higher energy levels are called excited states.

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Match each transition metal ion with its condensed ground-state electron configuration. A [Ar]3d2 B [Ar]4s23d3 C [Kr]4d10 D [Xe]

madreJ [45]

Answer:

$Mn^{2+}$ : - F . $[Ar]3d^{5}$

$Hg^{2+}$ : - G. $[Xe]4f^{14}5d^{10}$

$La^{3+}$ : - D. $[Xe]$

$Fe^{3+}$ : - F. $[Ar]3d^{5}$

$Ag^{+}$ : - C. $[Kr]4d^{10}$

$Co^{3+}$ : - E. $[Ar]3d^{6}$

Explanation:

The electronic configuration of the element Mn is:-

$[Ar]3d^{5}4s^2$

For, $Mn^{2+}$ , 2 electrons are lost, thus the configuration is:-

$[Ar]3d^{5}$

The electronic configuration of the element Hg is:-

$[Xe]4f^{14}5d^{10}6s^2$

For, $Hg^{2+}$ , 2 electrons are lost, thus the configuration is:-

$[Xe]4f^{14}5d^{10}$

The electronic configuration of the element La is:-

$[Xe]5d^{1}6s^2$

For, $La^{3+}$ , 3 electrons are lost, thus the configuration is:-

$[Xe]$

The electronic configuration of the element Fe is:-

$[Ar]3d^{6}4s^2$

For, $Fe^{3+}$ , 3 electrons are lost, thus the configuration is:-

$[Ar]3d^{5}$

The electronic configuration of the element Ag is:-

$[Kr]4d^{10}5s^1$

For, $Ag^{+}$ , 1 electron is lost, thus the configuration is:-

$[Kr]4d^{10}$

The electronic configuration of the element Co is:-

$[Ar]3d^{7}4s^2$

For, $Co^{3+}$ , 3 electrons are lost, thus the configuration is:-

$[Ar]3d^{6}$

7 0

3 years ago

Can you help me solve this problem???? How many carbon atoms are there in 2.12 molecules of propane? (C3H8)

zhenek [66]

Number of moles = 2.12 mol C3H8.
1 mol C3H8 = 6.02 × 1023 molecules C3H8.
<span>1 molecule C3H8 = </span>11 atoms.
(3 carbon atoms<span> and 8 hydrogen atoms)</span>

3 0

3 years ago

You've collected several samples of DNA at a crime scene, but they are all short strands. What technique would you rely on to as

Nezavi [6.7K]

Option C

PCR technique would you rely on to assist with analysis

<u>Explanation:</u>

Experts elaborate this tiny specimen by a means acknowledged as a polymerase chain reaction, or PCR. PCR produces replicas of the DNA significant like DNA duplicates itself in a cell, offering virtually any coveted measure of the ancestral element.

Following the accumulation of biological matter from a crime picture, the DNA is beginning derived from its biological source element and then estimated to assess the number of DNA rescued. Subsequent detaching the DNA from its cells, precise areas are imitated with a procedure acknowledged as the polymerase chain reaction, or PCR.

3 0

3 years ago

The energy stored in the bonds between atoms is

Marta_Voda [28]

A or B im not 100% sure.

8 0

3 years ago

Read 2 more answers

Calculate the molar mass, in g/mol, for the compound strontium nitrate, Sr(NO3)2.

nikdorinn [45]

By definition, the molar mass for the compound strontium nitrate Sr(NO₃)₂ is 211.62 g/mole.

<h3>Definitio of molar mass</h3>

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

The molar mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

<h3>Molar mass of strontium nirate</h3>

In this case, you know the molar mass of the elements is:

Sr= 87.62 g/mole
N= 14 g/mole
O= 16 g/mole

So, the molar mass of the compound Sr(NO₃)₂ is calculated as:

Sr(NO₃)₂= 87.62 g/mole + 2× (14 g/mole + 3×16 g/mole)

Solving:

Sr(NO₃)₂= 211.62 g/mole

Finally, the molar mass for the compound strontium nitrate Sr(NO₃)₂ is 211.62 g/mole.

Learn more about molar mass:

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brainly.com/question/2166483?referrer=searchResults

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2 years ago