Covalent and ionic bonds - Study guides, Class notes & Summaries

The most common isotope of hydrogen has one proton, no neutrons, and one electron. An isotope of hydrogen with 1 neutron would have: an atomic number of 1 and a mass number of 2 In a covalent bond: electrons are shared between atoms so that all atoms have full outer shells A property of a system that is present at one level of organization but absent at the levels below is called: an emergent property An ionic bond is weaker than a covalent bond Modern taxonomy attempts...

Question 1 Correct 1.00 points out of 1.00 Flag question Question text In an ecosystem, energy Select one: a. comes ultimately from bacteria b. cycles along with chemical nutrients c. typically flows from producers through a series of consumers d. typically flows from consumers to producers to decomposers Question 2 Correct 1.00 points out of 1.00 Flag question Question text Life is organized in a hierarchical fashion. Which of the following sequences correctly lists that hierarchy from least in...

IB Chemistry SL: Topic 4 Latest Version Graded A Ionic Bond Electrostatic attraction between oppositely charged ions Covalent Bond Electrostatic attraction between a pair of electrons and positively charged nuclei, formed as a result of electron sharing Metallic Bond Electrostatic attraction between a lattice of positive ions and delocalized electrons Polyatomic ions ions with more than one element e.g. CaCO3, Al(OH)3, Mg(NO3)2, (NH4)2SO4, Ba3PO4, LiHCO3 Lattice ions arran...

Penn Foster - Biology Lesson 1, The Nature of Science, the Chemistry of Life, and Ecology, Exercise Answer Key 100%Pass What is the scientific method? A systematic approach to investigating natural phenomena through observation, hypothesis formation, experimentation, and analysis. What are the four major elements that make up most of the human body? Carbon, hydrogen, oxygen, and nitrogen. What is the role of enzymes in biochemical reactions? Enzymes act as catalysts to spe...

Bios 1300 Cumulative Final with Verified Answers. Which of the following bond types is the weakest? Isotopic bonds Van der Waals forces Hydrogen bonds Ionic bonds Nonpolar covalent bonds Polar covalent bonds correct answers Van der Waals forces The lower the pH of a solution, the ________. lower the H+ concentration more neutral the solution is greater the number of oxygen atoms greater the number of H+ in solution less toxic the solution is correct answers greater the number of H+ ...

What six functions characterize all living things? Organization Responsiveness Growth Reproduction Movement Metabolism/Excretion What is homeostasis? A steady state of internal environment of an organism. What is the difference between positive and negative feedback? Give an example of each. Positive feedback enhances change (labor contractions during birth, blood clotting, etc...) Negative feedback resists change (body temperature, insulin, cortisol, etc...) List...

IB Bio A1.1 Water Questions and Answers Graded A+ List reasons why water is a substance on which life depends. A1.1.1 - Water as medium of life. 1. The first cells originated in water. 2. Water is the "universal solvent" allowing it to dissolve and transport molecules around a body. 3. Water is a metabolite in condensation and hydrolysis reactions. 4. Water is a temperature buffer in bodies and ecosystems. 5. Water maintains biological structures (such as phospholipid bilay...

WGU Biochemistry OA 2022/2023 Questions With Answers. Amino Acid backbone consists of Ans - 1. amino group 2. carboxyl group 3. alpha carbon 4. R group Amino group: looks likes/consists of Ans - NH3+ Carboxyl group looks like/consists of Ans - cooAlpha carbon looks like/consists of Ans - CH The three Amino acid categories Ans - 1. hydrophobic (nonpolar) 2. polar 3. charged Hydrophobic Amino Acids Ans - non polar afraid of h20 usually in the middle/core of the protein contains H + C...

Bios 1300 Cumulative Final with Verified Answers. Which of the following bond types is the weakest? Isotopic bonds Van der Waals forces Hydrogen bonds Ionic bonds Nonpolar covalent bonds Polar covalent bonds correct answers Van der Waals forces The lower the pH of a solution, the ________. lower the H+ concentration more neutral the solution is greater the number of oxygen atoms greater the number of H+ in solution less toxic the solution is correct answers greater the number of H+ ...

Bio 264 Final Review Questions And Answers Captain Jack Sparrow is in a sword fight with an evil skeleton pirate. If Jack were to cut off the skeleton's head, his sword would be following which body plane: - CORRECT ANSWER transverse Which of these statements about positive feedback is the MOST correct? - CORRECT ANSWER Birth is an example of a normally occurring positive feedback mechanism. Which of the following is NOT an example of a negative feedback loop? - CORRECT ANSWER ...