9 Identify the elements in group 2 (IIA) as metals, nonmetals or metalloids.
10. What are elements in group 1 (IA), group 6 (VIA) classified as? Group 7 (VII)? Group 8 (VIII? What type of ions will each form?
11. Which of these elements are very non-reactive? Which ones are reactive? Give reasons why.
A. Alkali Metals
c. Halogens
B. Alkaline Earth Metals
d. Noble Gases
12. A. According to the periodic table shown, describe what type of bonds would form between group A elements and group D elements?
B. Which group has orbitals that are completely full?How does this affect their reactivity? Why?
9. Elements in group 2 (IIA) are metals.
10.
- Elements in group 1 (IA) are classified as alkali metals and typically form +1 ions.
- Elements in group 6 (VIA) are classified as chalcogens and typically form -2 ions.
- Elements in group 7 (VII) are classified as halogens and typically form -1 ions.
- Elements in group 8 (VIII) are classified as noble gases and typically do not form ions.
11.
- Alkali Metals (Group 1) are very reactive because they have one valence electron which makes them highly likely to lose that electron to achieve a stable electron configuration.
- Alkaline Earth Metals (Group 2) are reactive but less so than alkali metals because they have two valence electrons.
- Halogens (Group 7) are very reactive because they have seven valence electrons and are only one electron away from completing their outermost shell.
- Noble Gases (Group 8) are very non-reactive because they have a full outer electron shell, making them stable and less likely to form bonds with other elements.
12.
A. Group A elements (Alkali Metals) would form ionic bonds with group D elements because alkali metals have a tendency to lose their outer electron(s) to achieve a stable electron configuration, while group D elements typically gain electrons.
B. Noble Gases (Group 8) have orbitals that are completely full, making them very stable and non-reactive. This is because they already have a full outer electron shell, so they have no need to gain or lose electrons to achieve stability, making them very unreactive.