I am sure the answer is D
If you type in the letters (uppercase and lowercase matters) into google it will give you the answers
Answer:
(a) (i) All the elements of a group have similar chemical properties because they have same no. of valence electrons in their outermost shell. (ii) All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.
NaOH will dissociate as Na+ and OH- in the solution.
Your answer is: C. Neutrons are inside the nucleus of a atom
