Soalan Atom dan Unsur

State the subatomic particle present in the nucleus of an atom.

Which atoms are isotopes?. State the reason.

State the number of valence electrons of atom D.

Draw the electron arrangement of ion A.

Calculate the relative atomic mass of C in natural abundance for 24C (75%), 25C (15%) and 26C (10%).

Name the groups of this element.

State another one special characteristic for the element.

Explain why Neon is an inert element.