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Atomic Structure
GCSE chemistry and combined chemistry
Question | Answer |
---|---|
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 |