Bohr and Lewis Dot Models

How many valence electrons does CL (Chlorine) have?

• 3

• 8

• 5

• 7

Answer explanation

Chlorine (Cl) is in group 17 of the periodic table, which means it has 7 valence electrons. This is because elements in this group have 5 p electrons and 2 s electrons in their outer shell.

Argon (Ar) has how many energy levels for electron's?

• 2

• 4

• 5

• 3

Answer explanation

Argon (Ar) has 18 electrons, which are arranged in 3 energy levels: 2 in the first level, 8 in the second, and 8 in the third. Therefore, the correct answer is 3 energy levels.

Tags

NGSS.HS-PS1-1

What is the number that all electron rings wish to reach in the Octet rule ?

• 6

• 10

• 4

• 8

Answer explanation

The Octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons. Therefore, all electron rings wish to reach the number 8.

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.

Tags

NGSS.HS-PS1-1

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.

Tags

NGSS.HS-PS1-1

How many valence electrons does K (Potassium) have?

• 2

• 3

• 5

• 1

Answer explanation

Potassium (K) is in Group 1 of the periodic table, which means it has 1 valence electron. This is the outermost electron that participates in chemical bonding, making the correct answer 1.

Chlorine (Cl) has how many energy levels for electron's?

• 3

• 4

• 5

• 2

Answer explanation

Chlorine (Cl) has an atomic number of 17, which means it has 17 electrons. These electrons are arranged in 3 energy levels: 2 in the first, 8 in the second, and 7 in the third. Therefore, the correct answer is 3.

Potassium (K) has how many energy levels for electron's?

• 5

• 3

• 4

• 2

Answer explanation

Potassium (K) has an atomic number of 19, which means it has 19 electrons. These electrons are arranged in 4 energy levels: 2 in the first, 8 in the second, 8 in the third, and 1 in the fourth. Thus, the correct answer is 4.

Calcium (Ca) has how many energy levels for electron's?

• 4

• 5

• 3

• 2

Answer explanation

Calcium (Ca) has an atomic number of 20, which means it has 20 electrons. These electrons are arranged in 4 energy levels: 2 in the first, 8 in the second, 8 in the third, and 2 in the fourth. Thus, the correct answer is 4.

How would you draw a Lewis dot diagram for Magnesium?

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Tags

NGSS.MS-PS1-1