Question

the atom of an element has 9 protons 9 electrons and 10 neutrons, find atomic number,mass number, electronic configuration, valance, valance electrons, metal or nonmetal, cathode and anode,period, group ??


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Answer 1

Answer:

Isha u haven't answered my previous question

I have answered one of ur question

Answer 2

Answer:

Since no. electrons in outermost shell are 7 hence it belongs from 17th group.

Since total electrons are filled in 3 shells like 2,8,7 and no. Of shells are equal to no. Of period hence no. Of period are 3.

Since Valence electrons are the total no. Of electron present in Valence shell i . e. Outermost shell which are 7.Since Valency is the no. Of electron required to complete it's octet I.e. 8 electron in Valence shell hence valency= 8-7= 1

Metals are those which contain 1,2,3 electrons in Valence shell or have tendency to lose electron to complete octet where as non metals are those which contain 1,2,3 electrons in Valence shell or have tendency to lose electron to complete octet where as non metals are those which contain 5,6,7 electrons in Valence shell or have tendency to gain electron to complete it's octet hence The is non metal.

Total No. Of protons in an atom = total no. Of electron= atomic no. Of an atom which is 17 for T

No. Of neutrons = mass no.- no. Of protons

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