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how to find screening constant for elements like for example, He?
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- (A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. Radioactive wastes, like uranium, must be handled and disposed of according to special regulations designed to protect people and the environment. Nuclear power plants produce too much greenhouse gases due to the burning of uranium. 2. In the experiment on determining the dissolved oxygen concentration of a water sample, the compound used to acidify the sample was hydrochloric acid. An acidic solution will have a pH greater than 7. 3. Pure water has a slight blue coloration that goes deeper as the thickness of the sample increases. Water follows the temperature of its surrounding. 4. The solubility of oxygen in water increases at colder temperatures, and decreases at higher temperatures. DO can be measured in milligrams of oxygen (O2) per liter of water. 5. An atom is composed of three subatomic…Reading lis Review Constants Periodic Table Part C Consider the following two expressions, the only difference being the presence or absence of parentheses. expression 1 : 3x2 expression 2: (3x)? Calculate the difference between the two expressions when x = 3; that is, evaluate both expressions then subtract one value from the other. Express your answer numerically. • View Available Hint(s) Submit Part DWhat is the average?
- [References] Use the References to access important values if needed for this question. Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice, complete the following table, where N is a number. log N 7.92 1.867 -1.402 Submit Answer Retry Entire Group 4 more group attempts remaining Previous Next Save and Exit4.Please give handwritten answerWhy do most metals make good electric conductors? A Metals have low specific heat. B Metals attract positive ions. C The electrons in metals flow easily between atoms. D The nuclei of metals easily donate protons.
- What is Ka, Kb, relationship between these and Kw.for number 10, do we have to match the color of the solution, like if it was red we make it read or should we match it with the color absorbed by the solution, such as green- red, orange- blue, and so on?Order the theories from oldest to most recent. START ORDER Atoms consist of mostly empty space with a dense nucleus of positive charge. Atoms are tiny indivisible particles that make up all matter. Electrons occupy specific energy levels surrounding a positively charged nucleus. Electrons move about a positively charged nucleus in clouds that are defined by probabilities. Negatively charged electrons are embedded in a mass of positive charge. END ORDER
- A east.cengagenow.com OWLV2 | Online te in Course: CHM_103_003 General Chemistry I [References] Use the References to access important values if needed for this question. 8A 1A H 2A 4A 5A 6A 7A He 3A Be BCNOF Ne Mg 1B 28 A1 Si PS CI Ar 3B 4B 5B 68 7E E 8B K Ca Sc Tiv Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag cd In Sn Sb Te I Xe Cs Ba La Hr Ta Hg TI Pb Bi Po At Rn Fr Ra Ac RT Ha et Er Tm Yb Lu ot Fm Md No Lr ot (1) What is the name of the element with a valence electron configuration of 3s2? (2) What is the name of the element with a valence electron configuration of 4s²4p2? Submit Answer Try Another Version 10 item attempts remaining Cengage Learning | Cengage Technical Support[References] Use the References to access important values if needed for this question. Many chemistry problems result in equations of the form 1.42 x 10-2 %3D (0.351 – z) When this equation is solved, the two values of the unknown r are and Submit Answer Retry Entire Group No more group attempts remain2. Compute for the atomic mass of these isotopes. (Show your solution.) a. 160 (99.76%), 170 (0.04%), and 180 (0.20%) b. 32S (95.06%), 33S (0.74%), 34S (4.18%), and 36S (0.02%) c. 35C1 (75.53%), and 37C1 (24.47%)