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kondor19780726 [428]
2 years ago
15

The modern periodic table is organized by increasing ______________ ___________.

Chemistry
2 answers:
professor190 [17]2 years ago
5 0

Answer:

atomic number.

Explanation:

maksim [4K]2 years ago
5 0

Answer:

Atomic number

Explanation:

The modern periodic table lists the elements in order of increasing atomic number (the number of protons in the nucleus of an atom).

<u><em>PLS MARK BRAINLIEST</em></u>

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Which electron configuration represents the electrons of an atom in an excited state? * 2-3 2-7-1 2-8 2-8-1​
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2-7-1

<h3>Further explanation </h3>

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the electrons in the third shell should fill the electrons in the second shell first according to Aufbau rule (lower energy shells)

\tt  1s^22s^22p^4\rightarrow ground~state\\\\1s^22s^22p^33s^1\rightarrow excited~state

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