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astra-53 [7]
4 years ago
8

Please help me. Chemistry

Chemistry
1 answer:
Wewaii [24]4 years ago
8 0

Answer:

element S is argon and element T is potassium.

4. B

5. D

Explanation:

in an element in periodic table number of elctrons and protons are same.

4. since element S has 18 protons so its atomic number must be 18 so the element is Argon which is the last element of period 4 so the next element will go to period 4 with one extra shell and since the atomic number of next element is 19 the element is Potassium. therefore T is Potassium.

5. number of nucleons in an atom is the number of protons and neutons combined together in an nucleus

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Answer and explanation:

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These processes would require the use of chemicals and physical tests, and also research laboratories.

<em>I hope this answer is helpful and clear.</em>

8 0
4 years ago
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Lina20 [59]

Answer:

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4 0
3 years ago
How does an atom become a positively charged lon?
marta [7]

Answer:

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8 0
2 years ago
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Find the molarity: 9.82 grams of lead (IV) nitrate are dissolved to make 465 mL of solution.
solmaris [256]
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3 years ago
Rank the following transitions in a hydrogen atom in order of increasing wavelength of electromagnetic radiation that could prod
Dmitrij [34]

Answer:

n=2 to n=4 < n=6 to n=8 < n=10 to n=12 < n=14 to n=16

Explanation:

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High energy photons have a very short wavelength. It should be noted that as n increases, the energy of successive energy levels decreases and transitions between them now occurs at longer wavelengths. Hence, the highest energy and shortest wavelength of photons are required for transition involving lower values of n because such electrons are closer to the nucleus and are more tightly bound to it than electrons found at a greater distance from the nucleus.

Hence transition involving electrons at higher energy levels occur at a longer wavelength compared to transition involving electrons closer to the nucleus. This is the basis for the arrangement of wavelengths required to effect the various electronic transitions shown in the answer.

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3 years ago
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