Rank the effective nuclear charge Z* experienced by a valence electron in each of these atoms: atom Z* experienced by a valence electron. An atom of aluminum. (pick one) An atom of argon. (pick one) An atom of phosphorus. (pick one) An atom of sulfur. (pick one) ☑

(ELECTRONIC STRUCTURE AND CHEMICAL BONDING Understanding periodic trends in effective nuclear charge Rank the effective nuclear charge Z experienced by a valence electron in each of these atoms: atom An atom of palladium. An atom of molybdenum. An atom of cadmium. An atom of niobium. z experienced by a valence electron. (pick one) (pick one) (pick one) ✓ (pick one) X Ś

Consider As and Br. Which would have a higher effective nuclear charge and why? O O Arsenic (As) because it has fewer electrons than bromine. Bromine (Br) because it has more electrons than arsenic. Arsenic (As) because both have the same number of core electrons, but Arsenic has fewer protons. Bromine (Br) because both have the same number of core electrons, but bromine has more protons. They have the same effective nuclear charge because they are in the same row.

1-An atomic cation with a charge of +2 has the following electron configuration: [He] 2s22p4 What is the chemical symbol for the ion?   How many electrons does the ion have?   How many 2s electrons are in the ion?       2-   Ammonium perchlorate (NH4ClO4) is powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen (N2) gas, chlorine (Cl2) gas, oxygen (O2) gas, and water vapor, releasing a great deal of energy. Calculate the moles of chlorine produced by the reaction of 0.90mol of ammonium perchlorate. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits. _____________ 3-How many protons and neutrons are in an atom of Th-229 ? Number of protons= ________ Number of neutrons= _______       4-  The chemical formula for beryllium sulfide is BeS. A chemist determined by measurements that 0.055 moles of beryllium sulfide…