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Masteriza [31]
3 years ago
14

What is the difference between the atomic number and the mass number of an element?

Chemistry
2 answers:
DedPeter [7]3 years ago
8 0

Mass number is the number of protons and neutrons in an atom, and it tells us about the mass of the atom in amu, or atomic mass units. Atomic mass is the average mass of all the isotopes of a certain type. It is a weighted average that takes into account the abundances of all of the different isotopes

hope this helps :)

aleksandr82 [10.1K]3 years ago
3 0

Atomic mass is also known as atomic weight. The mass number is a count of the total number of protons and neutrons in an atom's nucleus.

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Lynna [10]

Answer:

The electronic configuration that are incorrectly written is 1s²2s³2p⁶, 4s²3d¹⁰4p⁷, 3s¹ and 2s²2p⁴.

Explanation:

The electronic configuration of the elements corresponds to how all the electrons of an element are arranged in energy levels and sub-levels.

There are 7 energy levels —from 1 to 7— whose sublevels are described as s, p, d and f.

All electronic configurations begin with the term "1s" —corresponding to the sublevel s of level 1— so 4s²3d¹⁰4p⁷, 3s¹ and 2s²2p⁴ are incorrectly written. In addition, 4s²3d¹⁰4p⁷ is written incorrectly because is impossible to jump from the sublevel "s" to the sublevel "d" —which is found from level 3 and up— without passing through the sublevel "p".

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The other options are correctly written.

3 0
3 years ago
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8 0
3 years ago
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professor190 [17]
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2600 * 7 = 18,200

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