Elements and Their Properties

Fluorine (F)

• Atomic number: 9, indicating 9 protons in its nucleus.
• Approximately atomic mass: 19.
• Charge of a fluorine atom with a full outer shell: -1.
• Neutrons in a fluorine atom: 10 (calculated as atomic mass - atomic number).
• Electrons in a fluorine atom: 9, equal to the number of protons.

Beryllium (Be)

• Atomic number: 4, indicating 4 protons in its nucleus.
• Approximately atomic mass: 9.
• Neutrons in a beryllium atom: 5 (calculated as atomic mass - atomic number).
• Electrons in a beryllium atom: 4, equal to the number of protons.

Zinc (Zn)

• Abbreviation: Zn.
• Electrons in the first shell of zinc: 2.

Neon (Ne)

• Atomic number: 10, indicating 10 protons in its nucleus.
• Approximately atomic mass: 20.
• Neutrons in a neon atom: 10 (calculated as atomic mass - atomic number).
• Electrons in the first shell of neon: 2, but can hold up to 8 electrons.