Question

an element X has atomic mass 27 and atomic number 13 first draw the atomic structure of atomic X when it is 3 electron second also write the number of proton and neutron in the nucleus of atom x

Answer 1

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Answer 2

Atomic number -Z=13 .
Element is aluminum .
mass number is 27
Element is represented by    ²⁷Al₁₃
Number of protons=13
Mass number=number of protons + Number of neutrons
So, Number of neutrons=Mass number - number of protons
                                          =27-13
                                           =14 neutrons
electronic configuration: 1s²2s²2p⁶3s²3p¹
Electrons arranged in Shells are shown in attachment :