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Crazy boy [7]
3 years ago
8

Of the following three atoms, one tends to lose three electrons, another tends to lose two electrons, and another tends to lose

one electron. Rank these atoms in order of the number of electrons they tend to lose, from most to fewest: potassium, K; calcium, Ca; gallium, Ga. Rank from most to fewest.
Chemistry
1 answer:
vodomira [7]3 years ago
5 0

Answer: Ga > Ca > K

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

The electrons are filled according to Afbau's rule in order of increasing energies. The metals tend to get stable by losing electrons to attain noble gas configuration.

K:19:1s^22s^22p^63s^23p^64s^1

K^+:18:1s^22s^22p^63s^23p^6

Ca:20:1s^22s^22p^63s^23p^64s^2

Ca^{2+}:18:1s^22s^22p^63s^23p^6

Ga:31:1s^22s^22p^63s^23p^64s^23d^{10}4s^24p^1

Ga^{3+}:28:1s^22s^22p^63s^23p^64s^23d^{10}

Thus gallium (Ga) loses three electrons, Calcium (Ca) loses 2 electrons and Potassium (K) loses one electron.

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8 0
2 years ago
The balanced chemical equation for the reaction of copper (Cu) and silver nitrate (AgNO3) is shown below.
lesantik [10]
Remark
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Rule: if the moles are the same in the equation, then whatever you are given for one, will be the same for the other. So you have 0.854 moles of Ag. You will also have 0.854 moles of AgNO3 

Answer: 0.854 <<<<<
8 0
3 years ago
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What volume of carbon dioxide gas at STP is required to produce 456.9g of lithium carbonate?
Margarita [4]

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It would have to be around 9.8 volume

Explanation:

7 0
3 years ago
How did the surface area of the metal strip expose to the solution affect the
frez [133]

Answer:

See explanation below

Explanation:

In an electrochemical cell, electricity is obtained by the gradual deterioration of the anode.

Hence, surface area of the metal will affect the length of time within which the electrochemical cell works.

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3 0
3 years ago
When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3
Lelu [443]

Answer: 120g/mol

Explanation:

The first step we are to take is to calculate the freezing point depression of the solution.

ΔT(f) = freezing point of pure solvent - freezing point of solution

ΔT(f) = 5.48 - 3.77

ΔT(f) = 1.71°C

Next we are to calculate the molal concentration of the solution using freezing point depression

ΔT(f) = K(f) * m

m = ΔT(f)/K(f)

m = 1.71/5.12

m = 0.333 molal

Now, we calculate the molecular weight of the unknown...

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5 0
3 years ago
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