An elements "X"has mass number of 35 and the number of nutrons is 18 .identify the group number and period of "X"
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Given that mass=35 and Neutrons=18.
Mass = No. of protons + No. of neutrons
So, no of protons =35-18=17.
Atomic number = No of protons = 17.
Orbitals are filled as 2,8,8,18.
For element having number 17, it is filled as 2,8,7. So, it belongs in third period, and due to it being an obvious P block element, group number is 17 ( as 18 is argon which is noble gas). More specifically, the atom is an isotope of Chlorine.
Mass = No. of protons + No. of neutrons
So, no of protons =35-18=17.
Atomic number = No of protons = 17.
Orbitals are filled as 2,8,8,18.
For element having number 17, it is filled as 2,8,7. So, it belongs in third period, and due to it being an obvious P block element, group number is 17 ( as 18 is argon which is noble gas). More specifically, the atom is an isotope of Chlorine.
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as per given information element x is Cl it is in group 17 i.e halogen family and period no.3
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