Chemistry Daily 10’s Week 7.

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Presentation transcript:

Chemistry Daily 10’s Week 7

1 1. Mendeleev left spaces in his periodic table and predicted the existence of three elements and their A. atomic numbers. B. colors. C. properties. D. radioactivity.

2. Moseley's work led to the realization that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing a. atomic mass. b. density. c. radioactivity. d. atomic number.

2 1. The periodic law states that the properties of elements are periodic functions of their atomic numbers. What determines the position of each element in the periodic table? a. mass number b. number of neutrons c. number of protons d. number of isotopes

2. Elements in a group or column in the periodic table can be expected to have similar a. atomic masses. b. atomic numbers. c. numbers of neutrons. d. properties.

3 1. The atomic number of lithium, the first element in Group 1, is 3. The atomic number of the second element in this group is A. 4. B. 10. C. 11. D. 18.

2. How much greater is the atomic number of the fourth element in groups 1, 2 and 18 than the preceding element? a. 3 b. 4 c. 18 d. 20

4 1. Identify the sublevels in a period that contains 32 elements. a. s, f b. s, p c. s, p, d d. s, p, d, f

2. The electron configuration of cesium, atomic number 55, is [Xe] 6s1 2. The electron configuration of cesium, atomic number 55, is [Xe] 6s1. In what period is cesium? a. Period 1 b. Period 6 c. Period 8 d. Period 55

5 1. Hydrogen is placed separately from other elements in the periodic table because it a. is a gas. b. does not exist as a free element in nature. c. has atomic number one. d. has many unique properties.

2. To which block do the actinide elements belong. a. d block b 2. To which block do the actinide elements belong? a. d block b. s block c. f block d. p block

Answers & Standards 1.1 – c sc4 1.2 –d sc4 2.1 –c sc4b 2.2 –d sc4 4.2 – b sc4 5.1 – d sc4 5.2 –c sc4