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Atomic Structure

GCSE chemistry and combined chemistry

State the three subatomic particles Protons, neutrons, electrons
State the masses of the subatomic particles Protons: 1, neutrons: 1, electrons: 0
State the relative charges of the subatomic particles Protons: +1, neutrons: 0, electrons: -1
How are the subatomic particles arranged in an atom? Protons and neutrons in the nucleus, electrons orbiting in shells
What is the mass number of an atom? The number of protons + the number of neutrons in an atom
How do you calculate the number of neutrons in an atom? Mass number - atomic number
What is the mass and charge of a neutron? Mass = 1 Charge =0
Why do atoms have no overall charge? Because they have the same number of electrons as protons so the charges cancels each other out.
How does the size of the nucleus compare to the size of the atom? Nucleus is very small
How can you calculate relative atomic mass given isotopes masses and abundances? (mass 1 x abundance) + (mass2 x abundance) / 100
What are isotopes? Atoms of the same element with different mass numbers
What are the similarities and differences between isotopes? Same number of electrons and protons but a different number of neutrons.
Sodium has a mass number of 23, and an atomic number of 11. How many electrons, protons and neutrons? 11 protons, 11 electrons, 12 neutrons
Aluminium has a mass number of 27, and an atomic number of 13. How many electrons, protons and neutrons? 13 protons, 13 electrons, 14 neutrons
What makes an atom a particular type of atom? Each type of atom has a number of protons, a different number of protons would make something a different type of atom.
What are some of the values for relative atomic mass not whole numbers? They are the average mass of an atom of that isotope, there are several kinds each present in a different amount. So the average is not a whole number.
How do you work out the mass number of an element? no. protons + no. Neutrons
What do you do when asked to compare 2 atoms given atomic number and mass number? State how many electrons, protons and neutrons they both have.
Neon has a mass number of 20, and an atomic number of 10. How many electrons, protons and neutrons? 10 protons, 10 electrons, 10 neutrons
Nitrogen has a mass number of 14, and an atomic number of 7. How many electrons, protons and neutrons? 7 protons, 7 electrons, 7 neutrons
Created by: JBearfield



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