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A-level Chemistry Year 1
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The electron configuration of element X is: 1s22s22p5
What is the formula of a compound formed when calcium reacts with element X?
The electron configuration of element X is: 1s22s22p4
What is the formula of a compound formed when calcium reacts with element X?
Which ion has a different number of electrons from the other three ions?
Which statement best explains the meaning of the term ‘
Which of the statements below is true?
1) An atom of
2) An atom of
3) A 27 Al atom contains 14 electrons
The electron configuration of element X is: 1s22s22p63s23p5
What is the formula of a compound formed when rubidium reacts with element X?
Match the sub-atomic particles to their relevant charge