Much of the evidence for the existence of atoms comes from Multiple Choice chemistry. mechanics. biology. thermodynamics.

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MEA Naming components of the scientific method In the table below you will find three descriptions of sclentists engaging in activities that are part of the sclentific method. What are the missing words? description missing word? 5 ? After studying the chemical reactions of many compounds made of carbon, August discovers a chemical bonds to other atoms when it forms a compound. that says carbon always forms 4 about the arrangement of elements in the Wolfgang develops a Periodic Table, based on some ideas about how electrons are arranged in the different atoms of different elements. Using equations he develops, he is able to predict the exact arrangement of electrons in many atoms, and from there predict why they are where they are in the Periodic Table. Antoine burns some charcoal, and a very small diamond (!), and makes that the only product of both reactions is a heavy gas the (carbon dioxide). Explanation Check 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy C…

11. State whether the following elements are metals, nonmetals, or metalloids. a. Potassium b. Phosphorus C. Silicon d. lodine 12. Identify the principal type of energy (kinetic or potential) that is exhibited by each of the following. a. A piece of coal b. A falling rock ||| c. A compressed metal spring d. A rolling soccer ball on a level field

Which of the following is not one of the four postulates of the atomic theory?   Group of answer choices A. Atoms are divisible. B. Atoms of the same element have the same properties. C. Chemical compounds are composed of atoms of different elements D. Chemical reactions are merely rearrangements of the atoms

The radius of a tantalum atom is 142 pm. How many tantalum atoms would have to be laid side by side to span a distance of 1.87 mm? atoms

Read each description in the first column of the table below. If any chemical element with atomic number of S enter the chemical symbol of an element that matches. Otherwise check No in the second column. description An element in Period 2 and Group 4A. A metalloid in Group SA. An element in the nitrogen family with a lower atomic number than iodine. A main-group element in Period 5. Does any element with Zs 92 match the description? O Yes Yes O Yes O Yes O No O No O No O No If you checked yes, give the symbol of an element with Zs 92 that matches. 0 0