23. A chemist walks into his laboratory and finds that his assistant has reorganized his chemical cabinet to more closely relate to the trends on the periodic table. Not realizing this, he takes several chemical elements out and puts them back incorrectly. Using your knowledge of the periodic table, select the shelves that have misplaced chemical elements: Lithium, Potassium, Rubidium, Francium Nickel, Copper, Zinc, Argon Fluorine, Sulfur, Selenium, Strontium I. Most reactive shelf: II. Transitional metal shelf: II. Highly electronegative elements shelf: IV. Un-reactive shelf: Krypton, Neon, Radon, Helium (A) I and Il only (B) Il and III only (C) II, III, and IV only (D) I, II, III, and IV
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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