Which electrons are removed first when forming cations of Period 4 transition elements?

Answers

Answer 1
Answer: Electrons are always removed from the valence electron shells and from the valence orbitals within the shell when forming a cation. For example, Cr has a electronic configuration of 1s2 2s2 2p6 3s2 3p6 3d5 4s1
When forming the ion Cr3+, the new electronic configuration will be 1s2 2s2 2p6 3s2 3p6 3d3. We can see that 3 electrons are removed from the valence shell following the order of the highest energy orbitals to lower energy.

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Which task most likely involves a calculation that uses moles?

Answers

Determining the number of atoms in a jar of liquid task most likely involves a calculation that uses moles.

What do you mean by mole ?

The term mole is defined as a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.

A mole is the amount of material including 6.023 × 10²³ particles. 1 mol =  6.023 × 10²³particles. This number is also called Avogadro's number.

In determining the number of atoms that makes up a substance, the number  of moles is very necessary.

The mole is the favorable unit of quantity of particles. It can be likened to a quantity of things in everyday life like a dozen, a score and a gross.

A mole of any substance contains 6.023 x 10²³ particles

These particles can be atoms, protons, neutrons, electrons etc.

Thus, to find the number of atoms, we must know the number of moles.

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Your answer is: determining the number of atoms in a jar of liquid.

Water changing from a liquid to a gas is _____.precipitation
evaporation
condensation
transpiration

Answers

Answer : The correct option is, evaporation

Explanation :

Evaporation : It is a type of process in which the phase changes from liquid state to gaseous state at constant temperature.

Condensation : It is a type of process in which the phase changes from gaseous state to liquid state at constant temperature.

Precipitation : It is a type of process in which the solid is formed when the reaction occurs in liquid solution.

Transpiration : It is a process in which the water moves from roots of the plant to the small pores. That means the movement of water through the plant.

When water changing from a liquid to a gas is an evaporation.

Hence, the correct option is, evaporation.

Answer:

The answer is evaporation

the number of electrons in the outer ring of the elements phosphorus, potassium, oxygen, iodine, gold, bromine, sulfur, and cobalt?

Answers

Phosphorus = 5
Potassium = 1
Oxygen = 6
Iodine = 7
Gold = (a transition metal)
Bromine = 7
Sulfur = 6
Cobalt = (a transition metal)

For future reference, look at the group number along the top, it tells you :)

Answer: I think its c (germanium)

Explanation:

In a chemical compound, would you expect an oxide ion to be joined with one atom of calcium or one atom of potassium? Why?

Answers

I know what you're asking but I don't think the question is stated properly. Technically, an atom will not join with an "oxide" ion; i.e., the oxide ion is an atom of oxygen to which two electrons have been added. An oxide ion will add to 2 K ions or 1 Ca ion. The K ion has lost just one electron so it takes two of them to equal the 2- charge on the oxide ion whereas the Ca ion has lost two electrons and it takes only one of them to equal the charge on the oxide ion.

The following Lewis structures represent valid resonance forms. true or false​

Answers

The given Lewis structure does not show valid resonance form. So,the given statement is false.

What is Lewis structure?

The Lewis structure is the representation of the of valence shell in the molecule.

What is valence electron?

The electron present in outermost shell and which involve in chemical bond formation is called valence electron.

What is resonance structure?

Resonance is way to explain the localisation of electron in molecule where Lewis formula fails to describe.

The given statement is false because both structure shows different number of valence electron.

To learn more about Lewis structure here.

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Answer:

true

Explanation:

because Lewis represent valid resonance

The factor that affects how easily an electron can be removed from an atom is the.

Answers

Atomic radius aka distance from the nucleus to the outermost energy level. The greater this distance, the less electrostatic attraction between these oppositely charged particles.