Part B Mendeleev placed thallium (Tl) in the same group as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). However, the modern periodic table doesn't place thallium in this group. Use the periodic table C to find the properties of thallium. Explain why Mendeleev might have grouped thallium in the same group as lithium and sodium. Also eynlain how thallium is different from the other five elements​

Explain why scientists use shared characteristics to make cladograms.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

Draw the lewis dot structure for each of the following polyatomic ions