Question

From the given table answer the following- ELEMENT MASS NUMBER ATOMIC NUMBER A 11 5 B 19 9 C 3 2 D 23 11 E 9 4 a) How many electrons are present in E? b) Which is an inert gas? Why? c) Which atom will form a negatively charged ion? d) Which element has 12 neutrons? Why? e) Which atom will form a cation with one positive charge.

Answer 1

a) 4
b) D is inert gas it has completely filled electrons

c) B
d) D because neutrons is equal to atomic mass -atomic number

Answer 2

Answer:

same ques. i m having for my exams but i also even dont

know the ans