Valance electrons - Study guides, Class notes & Summaries

The chemistry & physics of molecules that make up living organisms - Molecular Biology Compounds that do not have a carbon backbone - Inorganic Compounds A substance that cannot be broken down into simpler substances by ordinary chemical reactions - Element Each element is given a ________________. - Chemical Symbol These four elements make up 96% of the mass of most organisms - Oxygen, Carbon, Hydrogen, Nitrogen The smallest portion of an element that retains its chemical properties - At...

NCATT AET Questions and Answers Already Passed Direct current is defined as the flow of electrons in one direction throughout a circuit with constant voltage and current Faraday's Law current will flow in a circuit provided there is electrical difference in potential and there is a path for it to flow Loads slow current by applying resistance Current flows from negative to positive Atoms represent the smallest elements that exist in nature Atoms are made up of protons, neutrons and electro...

ACS General Chemistry 1 studysheet Exam 124 Questions with Verified Answers 56=Mass # (A) 26= Atomic # (Z) Fe= symbol - CORRECT ANSWER 56= 26= Fe= Mass Number - CORRECT ANSWER Proton+ Neutrons Atomic Number - CORRECT ANSWER # of protons/electrons (equal in elemental form) - superscript - CORRECT ANSWER Add e- + superscript - CORRECT ANSWER subtract e- Isotope - CORRECT ANSWER Diff number of neutrons Isomer - CORRECT ANSWER two or more compounds with the same # of elemen...

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Matter - Answer-Anything that takes up space and has mass elements - Answer-substances that cannot be broken down by ordinary chemical means atoms - Answer-smallest piece of an element; smallest unit of matter major elements of the body - Answer-oxygen, carbon, hydrogen, nitrogen atomic structure - Answer-nucleus, electron shell atomic number - Answer-number of protons mass number - Answer-number of protons and neutrons isotope - Answer-atoms with different numbers of neutrons compound -...

The chemistry & physics of molecules that make up living organisms - Molecular Biology Compounds that do not have a carbon backbone - Inorganic Compounds A substance that cannot be broken down into simpler substances by ordinary chemical reactions - Element Each element is given a ________________. - Chemical Symbol These four elements make up 96% of the mass of most organisms - Oxygen, Carbon, Hydrogen, Nitrogen The smallest portion of an element that retains its chemical propert...

physical property correct answers A physical property iscan be observed without changing the identity of the substance. mixture correct answers matter composed of two or more substances. exothermic process correct answers process is one in which energy, often in the form of heat, is produced. mass number correct answers the sum of the number of protons and neutrons in the nucleus of an atom. isotopes correct answers atoms of the same element with a different number of neutrons and th...

1. In terms of electrons, what is an excited state? Give an example of an electron configuration for an excited state. (1 points) 2. Give the ground state electron configuration for Fe. (1 points) 3. What is a valance electron? How many valance electrons does Si have? (1 points) 4. What is the shorthand electron configuration of a potassium ion (K+)? (1 points) 5. Give the chemical formula (with charge) for each of the following polyatomic ions: (0.5 points each, 2.5 points total) 6. What ...

ACS GEN CHEM 1 FINAL Exam 166 Questions with Verified Answers The physical material of the universe. It is anything that has mass and occupies space. - CORRECT ANSWER Matter is made up of relatively few elements. - CORRECT ANSWER Matter The smallest building block of matter. Smallest particle that retains the chemical property of the element (O, He, S). - CORRECT ANSWER Atom Each _______ is made of the same kind of atom - CORRECT ANSWER Element Combination of atoms held together i...

Introduction to Chemistry Practice Exam Questions Correctly Answered. Atom - CORRECT ANSWER Smallest particle of matter proton - CORRECT ANSWER positive particle in the nucleus. electron - CORRECT ANSWER negative particle in an atom. Is found in the space surrounding the nucleus of an atom neutron - CORRECT ANSWER neutral particle in the nucleus element - CORRECT ANSWER a substance containing only one type of atom. Egs. Hydrogen, Helium, Lithium compound - CORRECT ANSWER two ...