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Katena32 [7]
3 years ago
8

What electron subshell is being filled for the rare earth series of elements on the periodic table? What electron subshell is be

ing filled for the actinide series?
Chemistry
1 answer:
iris [78.8K]3 years ago
8 0

Answer:

  • Scandium: 3d
  • Yttrium: 4d
  • Lanthanum: 5d
  • Rest of rare earth elements: 4f (<em>they are part of the f-block</em>)
  • Actinide series: 5f

Explanation:

The electron subshell being filled is defined by the differential electron, which is the last electron placed in the electron configuration.

The rare earth series involves 17 elements: scandium, yttrium and 15  lanthanides. The subshell filled for these elements are:

  • Scandium: 3d
  • Yttrium: 4d
  • Lanthanum: 5d
  • Rest of rare earth elements: 4f (<em>they are part of the f-block</em>)

The actinide series includes 15 elements. The electron subshell filled for these elements is 5f (<em>they are part of the f-block</em>).

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Which of the following statements is true?
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Answer:

The effect of adding a solute to a solvent has the opposite effect on the freezing point of a solution as it does on the boiling point. A solution will have a lower freezing point than a pure solvent. The freezing point is the temperature at which the liquid changes to a solid.

Explanation:

Hope this helps :3

7 0
3 years ago
Correct the incorrect reaction agno3(aq)+nacl(aq)→nacl(s)+agno3(aq) express your answer as a chemical equation. identify all of
Cloud [144]
I honestly do not know im sorry
6 0
3 years ago
Read 2 more answers
Tetrachloroethene, C2C14 is a solvent used in many dry cleaning processes.
kondaur [170]

An empirical formula presents the atoms of all the elements with the most simplified whole number ratios. In other words, divide each subscript by their greatest common factor.

The greatest common factor of 2 and 4 is 2.

2/2 = 1

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So, the empirical formula for tetrachloroethene is CCl₂.

6 0
3 years ago
A canister of neon contains 4.8x1024 atoms of the gas. How many moles of neon are present in the canister?
algol [13]

Answer:

7.97 moles of neon are present in the canister.

Explanation:

Avogadro's constant or "Avogadro's number" is the number of constituent particles found in the amount of substance in one mole.

In other words, Avogadro's number is the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.

So, you can apply the following rule of three: if 6.023*10²³ atoms are present in 1 mole, 4.8*10²⁴ atoms are present in how many moles?

amount of moles=\frac{4.8*10^{24}atoms*1 mole }{6.023*10^{23}atoms}

amount of moles= 7.97 moles

<u><em>7.97 moles of neon are present in the canister.</em></u>

4 0
3 years ago
Convert 0.00000000045 to scientific notation.
marusya05 [52]

Answer:

4.5 multiplied by 10, to the -10th power.

(4.5 \times 10 { - }^{10} )

8 0
3 years ago
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