Somebody please help me with Science?

Question

1. Describe the atomic model of the atom, and how it differed from the Rutherford model?

2. Explain how the reactivity of elements within Group 1 and Group 17differ and why ?

Please give to me a short answer, if you would @@@

Answer 1

I'm guessing by 'the atomic model' of the atom, you mean the correct model. It was proposed by bohr, and is essentially the same as the rutherford model except that the electrons are held into shells. Note the wikipedia article below.
as for the reactivity of different groups, you need to read about valence electrons. They're the number of electrons in the incomplete (outermost) electron shell -- group 1 has 1 valence electron, group 17 has one MISSING valence electron. Atoms are more stable when they have 'full' shells, and no incomplete ones, so the group 1 atoms will try to 'give away' their extra electron, while the group 17 atom will try and 'take away' one more electron to complete its shell.