Question

question 2 (4 points) use the following bohr model and your periodic table to fill in the blanks: image of bohr model with al in nucleus element name: __ atomic #: atomic mass (rounded): # of protons: # of neutrons: #of electrons: # of energy levels (shells): # of valence electrons: __ blank 1: blank blank 2: blank blank 3: blank blank 4: blank blank 5: blank blank 6: blank blank 7: blank blank 8: blank

Explanation:

Step1: Identify the element from the symbol

The symbol is Al, which stands for Aluminum. So the element name is Aluminum.

Step2: Determine the atomic number

Aluminum (Al) has an atomic number of 13 (from the periodic table).

Step3: Find the atomic mass (rounded)

The atomic mass of Al is approximately 27 (rounded from the periodic table value ~26.98).

Step4: Number of protons

The number of protons equals the atomic number, so it's 13.

Step5: Number of neutrons

Neutrons = Atomic mass - Atomic number = 27 - 13 = 14.

Step6: Number of electrons

In a neutral atom, electrons = protons, so 13.

Step7: Number of energy levels (shells)

Looking at the Bohr model, there are 3 energy levels (shells) as there are 3 concentric circles (electron shells).

Step8: Number of valence electrons

Valence electrons are in the outermost shell. The outermost shell (3rd shell) has 3 electrons (from the Bohr model or electron configuration: 2, 8, 3).

Answer:

Blank 1: Aluminum
Blank 2: 13
Blank 3: 27
Blank 4: 13
Blank 5: 14
Blank 6: 13
Blank 7: 3
Blank 8: 3