14

Question

Si
Silicon
28.086

Atomic number
atomic mass
# of protons
# of neutrons
# of electrons

Answer 1

For silicon (Si), with an atomic number of 14 and an atomic mass of approximately 28.086, here are the details:

• Atomic Number: 14 (This indicates the number of protons in the nucleus of an atom of silicon.)
• Atomic Mass: Approximately 28.086 (This is the weighted average mass of an atom of silicon, accounting for the existence of its isotopes.)
• Number of Protons: 14 (The number of protons is equal to the atomic number.)
• Number of Neutrons: Approximately 14 (You can find the number of neutrons by rounding the atomic mass to the nearest whole number and then subtracting the number of protons: 28 - 14 = 14.)
• Number of Electrons: 14 (In a neutral atom, the number of electrons equals the number of protons.)

In summary:

• Atomic Number: 14
• Atomic Mass: 28.086
• Number of Protons: 14
• Number of Neutrons: 14
• Number of Electrons: 14