Question

2.3 bohr models name: directions: draw bohr models for each element listed. sodium (na) protons: neutrons: electrons: number of electron levels: phosphorus (p) protons: neutrons: electrons: number of electron levels: chlorine (cl) protons: neutrons: electrons: number of electron levels:

Explanation:

Step1: Recall atomic number for protons

The atomic number of an element is equal to the number of protons. Sodium (Na) has an atomic number of 11, so the number of protons is 11. Phosphorus (P) has an atomic number of 15, so 15 protons. Chlorine (Cl) has an atomic number of 17, so 17 protons.

Step2: Determine neutrons

For a neutral - atom, we usually consider the most common isotope. Sodium has a mass number of approximately 23. Neutrons = Mass number - Protons. So for Na, neutrons = 23 - 11=12. Phosphorus has a mass number of approximately 31, so neutrons = 31 - 15 = 16. Chlorine has a mass number of approximately 35, so neutrons = 35 - 17 = 18.

Step3: Find electrons

In a neutral atom, the number of electrons is equal to the number of protons. So Na has 11 electrons, P has 15 electrons, and Cl has 17 electrons.

Step4: Calculate electron - levels

The electron - level distribution follows the 2n² rule. For Na (11 electrons), the first level has 2 electrons, the second level has 8 electrons, and the third level has 1 electron, so 3 electron levels. For P (15 electrons), the first level has 2 electrons, the second level has 8 electrons, and the third level has 5 electrons, so 3 electron levels. For Cl (17 electrons), the first level has 2 electrons, the second level has 8 electrons, and the third level has 7 electrons, so 3 electron levels.

Sodium (Na):
Protons: 11
Neutrons: 12
Electrons: 11
Number of Electron Levels: 3

Phosphorus (P):
Protons: 15
Neutrons: 16
Electrons: 15
Number of Electron Levels: 3

Chlorine (Cl):
Protons: 17
Neutrons: 18
Electrons: 17
Number of Electron Levels: 3

Answer:

Step1: Recall atomic number for protons

The atomic number of an element is equal to the number of protons. Sodium (Na) has an atomic number of 11, so the number of protons is 11. Phosphorus (P) has an atomic number of 15, so 15 protons. Chlorine (Cl) has an atomic number of 17, so 17 protons.

Step2: Determine neutrons

For a neutral - atom, we usually consider the most common isotope. Sodium has a mass number of approximately 23. Neutrons = Mass number - Protons. So for Na, neutrons = 23 - 11=12. Phosphorus has a mass number of approximately 31, so neutrons = 31 - 15 = 16. Chlorine has a mass number of approximately 35, so neutrons = 35 - 17 = 18.

Step3: Find electrons

In a neutral atom, the number of electrons is equal to the number of protons. So Na has 11 electrons, P has 15 electrons, and Cl has 17 electrons.

Step4: Calculate electron - levels

The electron - level distribution follows the 2n² rule. For Na (11 electrons), the first level has 2 electrons, the second level has 8 electrons, and the third level has 1 electron, so 3 electron levels. For P (15 electrons), the first level has 2 electrons, the second level has 8 electrons, and the third level has 5 electrons, so 3 electron levels. For Cl (17 electrons), the first level has 2 electrons, the second level has 8 electrons, and the third level has 7 electrons, so 3 electron levels.

Sodium (Na):
Protons: 11
Neutrons: 12
Electrons: 11
Number of Electron Levels: 3

Phosphorus (P):
Protons: 15
Neutrons: 16
Electrons: 15
Number of Electron Levels: 3

Chlorine (Cl):
Protons: 17
Neutrons: 18
Electrons: 17
Number of Electron Levels: 3