Question

write the symbol of an element X having atomic number z and mass number A​

Answer 1

Answer:

(a) The figure 9 indicates mass number.  

(b) The figure 4 indicates atomic number.  

(c) The number of protons in atom X should be 4.  

(d) The number of neutrons in atom X should be 5.  

(e) The number of electrons in atom X is 4.  

(f) In the outermost shell of an atom of element X there are 2 electrons.  

(g) The symbol of ion formed by an element Z is Lithium (Li)      

Explanation:

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Answer 2

AXZ is the symbol of the element