Octet rule - Study guides, Class notes & Summaries

The fundamental unit of life is the correct answers e. cell. Heterotrophs obtain their energy from correct answers c. other organisms. The initial accumulation of oxygen in the atmosphere was the result of photosynthesis from an organism most like modern correct answers a. cyanobacteria (blue green algae). Ozone is important to life on Earth because it correct answers c. blocks much ultraviolet radiation. Eukarya include correct answers e. All of the above The part of the atom tha...

CHEM 120 Final Exam 5 GRADED A+ (ACTUAL EXAM ) Questions and Answers (Solved) 1. How many bonds can nitrogen have? Which rule or principle should beused? A) Five bonds; octet rule. B) Three bonds; octet rule. C) Three bonds; the Hund's rule. D) Five bonds; the Aufbau Principle. Answer: B 2. When two hydrogen atoms meet, they will attract to each other and form abond (and a H2 molecule).Why? A) Because electrons like to stay together. B) Because electrons like to be paired up. C) Bec...

Chemistry Cumulative Review Latest Update Graded A+ Electronegativity The tendency of an atom to attract electrons in a chemical bond. It is not directly measurable. Metals have low electronegativity, meaning they do not hold onto electrons tightly and often lose them in reactions. Nonmetals have high electronegativity, meaning they hold onto electrons strongly and often gain electrons from other elements. Covalent Bond The sharing of electrons between two nonmetal atoms. ...

Organic chemistry: correct answer: The study of carbon-containing compounds except elemental carbon (diamond, graphite, coal), CO2, CO, carbonates, and cyanides. Inorganic chemistry: correct answer: Studies the elements and everything else. The principle components of food, fuels, wood construction, and clothing are organic compounds. Octet rule: correct answer: A chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each a...

Week 2 Ionic Compounds IONIC COMPOUNDS In this lesson, you will be exploring ionic bonding. You have encountered many examples of molecules containing Ionic bonds including table salt and sodium fluoride which is found in toothpaste. We will see in this lesson how ionic compounds are formed and how the formation of these compounds leads to the properties we observe. Which of the following would be considered an Ionic Compound? A. CH4 B. LiCl C. N2O4 D. SO In general, an ionic bond for...

Anatomy - Study of body structure Physiology - Study of function How are anatomy and physiology related? - structure determines what functions can take place Specialties in the study of anatomy - Macroscopic and microscopic Specialties in the study of physiology - Cell, special (specific organs), systemic (organ systems), and pathology (disease) Homeostasis - process by which organisms maintain a relatively stable internal environment components of homeostasis - stimulus, recep...

BIOLOGY PENN FOSTER EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS 100% VERIFIED LATEST UPDATE Cells are the smallest unit of life The correct order of biological organization Population, community, ecosystem, biosphere Adaptation A modification that makes organisms more suited to their environment Archaea The life domain whose members live in very harsh environments, such as salt lakes and hot springs During a scientific experiment, the control group is identical to the experime...

Covalent bonds are formed between CORRECT ANSWER nonmetals Why can a hydrogen atom form a covalent bond without fulfilling the octet rule? CORRECT ANSWER Hydrogen's valence shell can hold only up to two electrons. After a covalent bond has stabilized an atom, the atom will have CORRECT ANSWER a full valence electron shell. What best explains how two oxygen atoms, each with six valence electrons, can bond with each other? CORRECT ANSWER Each atom can share two electrons with the other s...

what is water of crystallisation? - correct answer water molecules that make up part of the crystal structure of a solid define relative isotopic mass - correct answer the ass of an atom of an isotope of an element relative to one twelfth the mass of an atom of C-12 why is relative atomic mass written as a decimal? - correct answer it is a weighted average mass define molecular formula - correct answer the actual number of atoms of each element in a compound define what an orbital is...

Anatomy & Physiology - Chapter 2 Exam Study Guide. Elements - answersubstance composed of only one type of atom that cannot be broken into simpler constituents by chemical means compounds - answerchemical combination of two or more elements atoms - answersmallest particle of a chemical element that retains the properties of that element; particles that combine to form molecules subatomic particles - answerparticles that make up atoms; neutrons, protons, electrons nucleus - answerdense, c...