Question
How many electrons can fit in the second or third orbit?
- 2
- 8
- 4
- 16
Hint:
The general formula for number of electrons in a shell is 2n2.
The correct answer is: 8
- Each shell can contain only a fixed number of electrons
- The general formula for number of electrons in a shell is 2n2.
- The maximum amount of electrons that can fit in the second orbit of a Bohr-Diagram is 2(2)2 is 8 and for third shell is is 2(3)2 is 18.
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)
The region surrounding a nucleus, known as an electron shell, is where electrons are typically located.
¶1s, 2s, 2p, 3s, 3d, 4p, 5s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, and 8s are the numbers in order. Although it is difficult to remember, there is a simple approach. Move from top to bottom, top right end to the bottom left of each line, in the order of the lines.
¶The lowest accessible shell nearest to the nucleus must be occupied by electrons.
¶The most electrons that can fit into each shell are:
¶There were two in the first shell, eight in the next, and eight in the last.
The twenty-first element, calcium, has two more electrons in the fourth shell.
How many shells are present in potassium?
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)
The region surrounding a nucleus, known as an electron shell, is where electrons are typically located.
¶1s, 2s, 2p, 3s, 3d, 4p, 5s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, and 8s are the numbers in order. Although it is difficult to remember, there is a simple approach. Move from top to bottom, top right end to the bottom left of each line, in the order of the lines.
¶The lowest accessible shell nearest to the nucleus must be occupied by electrons.
¶The most electrons that can fit into each shell are:
¶There were two in the first shell, eight in the next, and eight in the last.
The twenty-first element, calcium, has two more electrons in the fourth shell.