Silicon's (Si) atomic number is 14. Which of the following is true regarding an atom of silicon? SELECT AN ANSWER
The atom must have 14 electrons, but can have a different number of protons and neutrons.

The atom must have 14 neutrons.

The atom must have 14 protons, neutrons, and electrons.

The atom must have 14 protons and electrons, but can have a different number of neutrons.

SUBMIT

The element's number of electrons is determined by the atomic number.

Silicon has an atomic mass of 28.09. Round it up, the whole number is 28.

The atom must have 14 neutrons AND 14 protons with a mass that adds up to 28.

So, the ones correct are:

The atom must have 14 neutrons.

The atom must have 14 protons, neutrons, and electrons.

The "The atom must have 14 protons and electrons, but can have a different number of neutrons." is true, but that would make Silicon an isotope. Isotopes are atoms of the same element, but different masses. That implies it would have a different amount of neutrons. The number of protons is always the atomic number.

"The atom must have 14 electrons, but can have a different number of protons and neutrons." is false because if you f with the protons, it's no longer silicon. You feel me?

Hope this helps! Sorry for the wait. :(

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