Which of the following element would lose an electron easily?

Five elements A, B, C, D and E have atomic numbers of 2, 3, 7 10 and 18 respectively.The elements which belong to the same group of the periodic table is :

The elements A, B, C, D and E have atomic numbers 9, 11, 17, 12 and 13 respectively. The pair of elements which belongs to the same group of the periodic table is:

Which of the following element does not lose an electron easily?

Where would you locate the element with electronic configuration 2, 8 in the modern periodic table?