Which of the following statements about elements in the Periodic Table is correct?
- AAcross a period, elements at the left-hand side of the Periodic Table are more metallic than those at the right-hand side.
- BDown a group, elements at the top of the group lose electrons more readily than those at the bottom of the group.
- CElements in the same group of the Periodic Table have the same number of completed shells of electrons.
- DElements in the same period of the Periodic Table have the same number of electrons in the outer shell.