Question

element name:
atomic mass
atomic number
protons
electrons
neutrons

element name:
atomic mass
atomic number
protons
electrons
neutrons

element name:
atomic mass
atomic number
protons
electrons
neutrons

element name:
atomic mass
atomic number
protons
electrons
neutrons

Explanation:

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Topmost Atom (1st)

Step1: Count protons (atomic number)

Protons = 2 (positive symbols)

Step2: Count electrons (neutral atom)

Electrons = 2 (dark dots)

Step3: Count neutrons (neutral circles)

Neutrons = 1

Step4: Calculate atomic mass

Atomic Mass = Protons + Neutrons = $2 + 1 = 3$

Step5: Identify element (atomic number 2)

Element = Helium

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2nd Atom (from top)

Step1: Count protons (atomic number)

Protons = 6 (positive symbols)

Step2: Count electrons (neutral atom)

Electrons = 6 (dark dots)

Step3: Count neutrons (neutral circles)

Neutrons = 6

Step4: Calculate atomic mass

Atomic Mass = $6 + 6 = 12$

Step5: Identify element (atomic number 6)

Element = Carbon

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3rd Atom (from top)

Step1: Count protons (atomic number)

Protons = 7 (positive symbols)

Step2: Count electrons (neutral atom)

Electrons = 7 (dark dots)

Step3: Count neutrons (neutral circles)

Neutrons = 7

Step4: Calculate atomic mass

Atomic Mass = $7 + 7 = 14$

Step5: Identify element (atomic number 7)

Element = Nitrogen

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Bottommost Atom (4th)

Step1: Count protons (atomic number)

Protons = 4 (positive symbols)

Step2: Count electrons (neutral atom)

Electrons = 4 (dark dots)

Step3: Count neutrons (neutral circles)

Neutrons = 5

Step4: Calculate atomic mass

Atomic Mass = $4 + 5 = 9$

Step5: Identify element (atomic number 4)

Element = Beryllium

Answer:

1. Topmost Atom:

• Element Name: Helium
• Atomic Mass: 3
• Atomic Number: 2
• Protons: 2
• Electrons: 2
• Neutrons: 1

1. 2nd Atom (from top):

• Element Name: Carbon
• Atomic Mass: 12
• Atomic Number: 6
• Protons: 6
• Electrons: 6
• Neutrons: 6

1. 3rd Atom (from top):

• Element Name: Nitrogen
• Atomic Mass: 14
• Atomic Number: 7
• Protons: 7
• Electrons: 7
• Neutrons: 7

1. Bottommost Atom:

• Element Name: Beryllium
• Atomic Mass: 9
• Atomic Number: 4
• Protons: 4
• Electrons: 4
• Neutrons: 5