HESI A2 CHEMISTRY FILES Revision Questions with First Class Answers and Updated Study Material to Score Grade A 2021

HESI A2 CHEMISTRY FILES Revision Question with top Rated Answers 2021 | What are all metric measurements composed of? What is the most commonly used temperature scale in the scientific community? The nucleus of an atom contains or is made up of which of the following? What is an atom that has a positive charge called? In the periodic table, what are the rows called? What is the atomic number? Which of the following describes the atomic mass? Chemical equations are written in which manner? What is the charge on potassium in the compound KCl? A catalyst is a substance that accelerates a reaction by which of the following? Percent concentration of a solution is expressed as which of the following? What will one liter of a molar solution of any element contain? Chemical bonding is the bonding of which of the following? Which of the following describes an ionic bond? What is the concentrationof 58.5 g of NaCl in 2 L of solution (atomic weights of each elements are as follows: Na=23g/mol, Cl=35.5g/mol)? 0.5 mol NaCl In a redox reaction, which of the following describes reduction? It is the gain of electrons What are acids? What is a benefit of water's ability to make hydrogen bonds? What are bases or alkaline solutions? Chemical reactions in living systems proceed along catabolic pathways, and there tends to be an increase in which of the following? Entropy What is a pH of 7? Neutral Which is the correct way to write Iodine (I) with an atomic mass of 131? What is the correct formula for magnesium chloride? What is the weakest of all intermolecular forces? Which of the following describes carbohydrates? Glycolysis is one of the body's chemical pathways for which of the following? Amino acids are the building blocks for which of the following? What is the union of two amino acids using a peptide bond Subatomic particles consist of: d. Isotopes e. Ions f. Protons, Neutrons, and Electrons g. Elements The correct answer is C. The subatomic units are what give atoms their properties and consist of protons, neutrons, and electrons. 2. Which of the following is true of elements? e. They are substances made of 100% of the same type of atom f. When neutral, they are substances in which the number of protons and electrons are identical g. The positively charged protons and negatively charged electrons are responsible for the attraction of atoms within an element h. All of the above are true 3. Which groups of elements on the periodic table are considered main group elements? e. Groups 1, 2, 13, 14, 15, 16, 17, and 18 f. Groups 1, 2, 14, 15. 16, 17, and 18 g. Groups 13-18 h. Groups 1-2 4. What are transition metals? e. Elements that serve as a transition between group 1 and 2 elements. f. Elements that serve as a transition between the two main group elements g. Elements that serve as a transition between lanthanides and actinides h. Elements that have electrons which do not transition between orbitals 5. In which order do electrons fill orbitals? e. 1, 2, 3, 4 f. a, b, c, d g. 2, 2, 6, 6 h. s, p, d, f 6. Which of the following is the correct electron configuration of Chlorine? e. 1