InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
A group of elements in the periodic table are given below (boron is the first member of the group and thallium is the last).Boron, Aluminium, Gallium, Indium, Thallium.Answer the following questions in relation to the above group of elements:(a) Which element has the most metallic character?(b) Which element would be expected to have the highest electronegativity?(c) If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium(d) The atomic number of boron is 5. Write chemical formula of the compound formed when boron reacts with chlorine.(e) Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer. |
|
Answer» (a) Thallium has the most metallic character since metallic character increases down the group (b) Boron has the highest electronegativity since it has the smallest size in the group. (c) 3. Since all the elements in a group have same number of valence electrons. (d) BCl3 (e) The elements in the group to the right of boron group would be less metallic as with the decrease in size and increase in atomic number, it will be more difficult for them to lose electrons |
|