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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom3 Marks
Question
An element $X$ has a mass number $= 37$ and it contains $17$ protons.
  1. Write the symbolic representation of the element.
  2. Find the number of neutrons and electrons in the element.
  3. Write the electronic configuration of the element.
✓

Answer

The mass number of the element $X = 37$ Number of protons $= 17$
  1. Symbolic representation is:
Element = Aluminium $(Al)$
  1. Number of neutrons $= 37 - 17 = 20$
Number of the electrons are $= 17$
  1. Electronic configuration is $2, 8, 7$

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