A sample of Cesium is 75.00% with a mass of 133.00 amu, 20.00% with a mass of 132.00 amu, and 5.000% with a mass of 134.00 amu. What is its average atomic mass?

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction