Flashcards
GCSE 1
Cards in this deck (17)
- 1What is an element?A substance made up of the same atoms
- 2What are the three subatomic particles and their charges?Protons, Neutrons and Electrons
- 3What is the difference between the atomic number and the mass number?The atomic number is the number of protons
The atomic mass is the total number of protons and neutrons. - 4What did Rutherford discover about the atom's structure?That atoms have a small, dense, positively charged nucleus.
- 5How are electrons arranged in an atom?In energy levels (shells) around the nucleus.
- 6What is an isotope?Atoms of the same element with the same number of protons but different numbers of neutrons.
- 7Which part of the atom has almost all the mass?The nucleus as there is space between the electrons, shell(s) and nucleus
- 8What model replaced the plum pudding model?The nuclear model of the atom.
- 9Who discovered the nucleus and when?James Chadwick in 1932.
- 10How many electrons can the first electron shell hold?2
- 11What is the electron configuration of magnesium?2, 8, 2
- 12What did Rutherford’s gold foil experiment show?That atoms have a tiny, dense, positively charged nucleus.
- 13What is the charge of the nucleus?Positive
- 14What is the relative mass of a proton, neutron, and electron?Proton = 1, Neutron = 1, Electron = nearly 0 (1/2000)
- 15How do you calculate the number of neutrons in an atom?Atomic mass - number of protons/ electrons
- 16What is the overall charge of an atom?Neutral
- 17What are all atoms of the same element defined by?Same number of protons in their nucleus
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- GCSE Chemistry Flashcards on GCSE 1, created by Martha Jones on 08/06/2025.
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- Martha Jones
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