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How are atoms arranged in the modern Periodic Table? A In order of atomic number B In order of relative atomic mass C In order of the number of neutrons D In order of reactivity Your answer - OCR Gateway - GCSE Chemistry: Combined Science - Question 3 - 2019 - Paper 9
Question 3
How are atoms arranged in the modern Periodic Table? A In order of atomic number B In order of relative atomic mass C In order of the number of neutrons D In order o... show full transcript
Worked Solution & Example Answer:How are atoms arranged in the modern Periodic Table? A In order of atomic number B In order of relative atomic mass C In order of the number of neutrons D In order of reactivity Your answer - OCR Gateway - GCSE Chemistry: Combined Science - Question 3 - 2019 - Paper 9
Step 1
A. In order of atomic number
Answer
Atoms in the modern Periodic Table are arranged in order of increasing atomic number. The atomic number represents the number of protons in the nucleus of an atom, which defines the element's identity. This arrangement allows for trends in properties such as electron configuration and chemical reactivity to be observed as one moves across a period or down a group.