Write the name and symbol of the element with the following atomic number: (4.1, 4.2)h. 92

Look again at the trends illustrated in Figures 2.3 and 2.4.a. How do the peaks/valleys correlate with locations in the periodic table?b. Are there other chemical properties that also exhibit periodic trends? What are they?

Give the symbol of the element described by each of the following:a. the alkaline earth metal in Period 2

Why does the fourth period in the periodic table contain 18 elements?

Look again at the trends illustrated in Figures 2.3 and 2.4.a. How do the peaks/valleys correlate with locations in the periodic table?b. Are there other chemical properties that also exhibit periodic trends? What are they?