TEAS-Chemistry Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

TEAS-Chemistry Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the atomic number of an element? The atomic number represents the number of protons in the nucleus of an atom of an element. What is the primary difference between an element and a compound? An element consists of only one type of atom, while a compound is made up of two or more different atoms chemically bonded together. What is the process of oxidation in chemistry? Oxidation is the process in which an atom or molecule loses electrons, often associated with the addition of oxygen or the removal of hydrogen. What is the pH scale used for? The pH scale is used to measure the acidity or alkalinity of a solution, ranging from 0 (acidic) to 14 (alkaline), with 7 being neutral. 2 What does the law of conservation of mass state? The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, it is conserved. What is a catalyst in a chemical reaction? A catalyst is a substance that speeds up a chemical reaction without being consumed or altered in the process. What is the main characteristic of an exothermic reaction? An exothermic reaction releases energy, usually in the form of heat, to the surroundings. What is the atomic mass of an element? The atomic mass is the weighted average mass of an element’s isotopes, measured in atomic mass units (amu). What is the role of electrons in chemical bonding? Electrons are involved in chemical bonding by being shared (covalent bonds) or transferred (ionic bonds) between atoms. 3 What is the difference between a covalent bond and an ionic bond? A covalent bond involves the sharing of electrons between atoms, while an ionic bond involves the transfer of electrons from one atom to another. What is the main purpose of the periodic table? The periodic table organizes elements based on their atomic number, electron configuration, and chemical properties. What is Avogadro’s number? Avogadro's number is 6.022 x 10^23, which represents the number of particles in one mole of a substance. What is the role of a solvent in a solution? The solvent is the substance in which a solute is dissolved to form a solution, typically present in a larger quantity. What does the term “molarity” refer to in chemistry? Molarity refers to the concentration of a solution, expressed as the number of moles of solute per liter of solution. 4 What is the principle of Le Chatelier’s principle in chemical equilibrium? Le Chatelier's principle states that if a system at equilibrium is disturbed, the system will shift to counteract the change and restore equilibrium. What is the function of the electron microscope in chemistry? An electron microscope uses electrons instead of light to examine the structure of molecules and atoms at a much higher resolution than light microscopes. What is the difference between an acid and a base? Acids release hydrogen ions (H+) when dissolved