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pogonyaev
4 years ago
5

1.) How can atomic number and mass number be used to find the numbers of protons, electrons, and neutrons?

Chemistry
1 answer:
Contact [7]4 years ago
5 0
I think Atomic mass minus Atomic number is the number of protons
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The electron configuration for neon (atomic number = 10) is NOT 1s22s12p6. Which of the following are reasons why? (Mark all tha
Inessa [10]

Answer:

The answer to your question is:  B and C.

Explanation:

Neon atomic number = 10

Electron configuration is not :   1s²2s¹2p⁶  .

This electron configuration is for fluor (9 electrons) because is we sum up the electrons ( 2 + 1 + 6) the result is 9.

A)The 3s orbital should be part of the configuration.  This is not the right reason.

B)The total number of electrons is incorrect.  This correct, the number of electrons is 9 instead of 10.

C)The 2s orbital does not have enough electrons.  This option is correct, 2s must have 2 electrons and it only has 1.

D) The 1s orbital does not have enough electrons. This option is incorrect, 1s orbital can have only 2 electrons.

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3 years ago
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What charge would you expect for an formed by P?
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3 years ago
Metals have high melting and boiling points and are often shiny and silvery. Which of the blocks are metals?
DanielleElmas [232]

Answer:

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Explanation:

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P- block elements includes beryllium, magnesium, calcium, strontium, barium, radium metals.

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They easily lose their valance electrons and form cation with charge of +2.

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They are also very reactive metals.

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