Bohr and Lewis Dot

How many electrons should Argon have around its Lewis dot model?

• 5

• 6

• 7

• 8

Answer explanation

Argon has 8 electrons in its outer shell, which corresponds to its position in Group 18 of the periodic table. This full outer shell makes Argon a noble gas, thus the correct answer is 8.

Tags

NGSS.MS-PS1-1

How many electrons should Potassium have around its Lewis dot model?

• 1

• 2

• 7

• 8

Answer explanation

Potassium (K) has an atomic number of 19, meaning it has 19 electrons. In its Lewis dot model, it has 1 valence electron in the outer shell, which is why the correct answer is 1.

How many electrons should Calcium have around its Lewis dot model?

• 1

• 2

• 7

• 8

Answer explanation

Calcium (Ca) is in group 2 of the periodic table and has 2 valence electrons. In a Lewis dot model, these valence electrons are represented as dots around the element symbol, so Calcium should have 2 electrons.

How many valence electrons?

• 2

• 3

• 4

• 5

Answer explanation

The element in question has 4 valence electrons, which is typical for elements in group 14 of the periodic table. This is why the correct answer is 4.

Tags

NGSS.MS-PS1-1

How many valence electrons?

• 2

• 3

• 5

• 10

Answer explanation

The correct answer is 5 because elements in group 15 of the periodic table, like phosphorus, have 5 valence electrons. This is determined by the number of electrons in the outermost shell.

Tags

NGSS.MS-PS1-1

How many energy levels does this element have

• 7

• 5

• 3

• 2

Answer explanation

The element in question has 3 energy levels, which correspond to the principal quantum number (n) values of 1, 2, and 3. This is typical for elements in the second and third periods of the periodic table.

How many valence electrons does CA (Calcium) have?

• 4

• 1

• 2

• 3

Answer explanation

Calcium (Ca) is in group 2 of the periodic table, which means it has 2 valence electrons. Therefore, the correct answer is 2.

How many valence electrons does Ar (Argon) have?

• 8

• 4

• 6

• 10

Answer explanation

Argon (Ar) is a noble gas with an atomic number of 18. It has 8 valence electrons, which are in its outermost shell, making it stable and unreactive. Therefore, the correct answer is 8.

How would you draw a Lewis dot diagram for Magnesium?

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Tags

NGSS.MS-PS1-1

Which is the correct Lewis Dot Structure for Oxygen?

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