How many Protons, Neutrons and Electrons are there in an atom of Silicon, Si?

Using a copy of the periodic table, look up the Mass and Atomic numbers of Silicon. Mass number = 28; Atomic number = 14. The Atomic number is equivalent to the number of Protons in an atom, so there are 14 Protons present in Silicon. The Mass number is equal to the number of Protons plus the number of Neutrons in an atom, so by subtracting the Atomic number from the Mass number we can determine that there are 28 - 14 = 14 Neutrons in Silicon. In an uncharged atom, the number of Electrons equals the number of Protons, so there are 14 Electrons in an atom of Silicon.

Answered by Eloise S. Chemistry tutor

73921 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

What is Fractional Distillation and how does it work?


What is a mole?


Lithium and potassium are both in Group 1 of the periodic table. Explain why.


5.00 g of copper(II) carbonate decomposes to form copper(II) oxide and carbon dioxide: CuCO3(g) → CuO(s) + CO2(g). Calculate the maximum mass of carbon dioxide that can be produced. (Mr of CuCO3 = 123.5, Mr of CO2 = 44.0)


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences