3 & 13. Periodicity & transition metals (2)
For each question choose the answer you consider to be the best.1. An element is in period 3 and group 15 of the periodic table. How many electronsare present in the highest occupied energy level of this element?A. 3B. 5C. 13D. 152. Which best describes the trends of electronegativity values within the periodic table?A. The values increase across a period (from left to right) and decrease down a group.