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Luden [163]
3 years ago
5

Which trends are observed when the elements in Period 3 on the Periodic Table are considered in order of increasing atomic numbe

r?
(1) The atomic radius decreases, and the first ionization energy generally increases.
(2) The atomic radius decreases, and the first ionization energy generally decreases.
(3) The atomic radius increases, and the first ionization energy generally increases.
(4) The atomic radius increases, and the first ionization energy generally decreases.
Chemistry
1 answer:
emmainna [20.7K]3 years ago
8 0
The correct answer is option 1. The atomic radius decreases and the first ionization energy generally increases. This is predicted in the periodic table. In the periodic table, the atomic radius decrease as one moves across the table and the ionization energy increases.
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3 years ago
Of the following reactions, which is a fission reaction?
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Answer:

it's c

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4 years ago
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Answer:

  • <u><em>Substance A.</em></u>

Explanation:

pH is a measure of the concentration of H₃O⁺ ions in a solution.

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     pH=\log \dfrac{1}{[H_3O^+]}=-\log [H_3O^+]

For the given substances

Sustance        [H₃O⁺]         pH = - log [H₃O⁺]

                           M

    A                4×10⁻⁶         -log (4×10⁻⁶) = 5.4 ← answer

    B                6×10⁻⁷         -log (6×10⁻⁷) = 6.2

    C               error                      - - - - - -

    D               1.3×10⁻¹        -log (1.3×10⁻¹) = 0.89

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3 0
3 years ago
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Answer:

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8 0
3 years ago
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