Mendeleev Study guides, Class notes & Summaries

Proton c/m? - correct answer +1, 1 Neutron c/m? - correct answer 0, 1 Electron c/m? - correct answer -1, 1/1500 Mass number? - correct answer Num of protons + neutrons Atomic number? - correct answer Num protons Isotope? - correct answer Different atom of the same element, same num protons. Diff ...

Democritus and Leucippus Correct Answer: envisioned atomos (invisible particle) Plato Correct Answer: proposes aether (dodecahedron) fire (tetrahedron) water (icosahedron) air (octahedron) earth (cube) Kanada Correct Answer: said that atom was indestructible Aristotle Correct Answer: believes that matter is infinitely divisible Asharite school Correct Answer: where Islamic philosophers synthesize Greek and Indian ideas Gassendi Correct Answer: reconciles atomic theory wi...

Where does an element take its identity from? Gets its identity from tiny particles, its protons. How much gold (Au) is extracted per ton of rock ore? 1oz of gold per ton How much does a gold (Au) bar weigh and how much is it worth? Weighs 60 pounds, it is worth 1.5 million dollars Why is copper (Cu) so widely sought on the world market and New York Mercantile Exchange? Has lots of good qualities- gets rid of bacteria and malleable. Copper is an indicator of the world e...

What is the charge of a proton? - ANSWER-+1 What is the charge of a neutron? - ANSWER-0 What is the charge of an electron? - ANSWER--1 What is the relative mass of a proton? - ANSWER-1 What is the relative mass of a neutron? - ANSWER-1 What is the relative mass of an electron? - ANSWER-Very small How many types of atoms do elements contain? - ANSWER-Only one type What are compounds? - ANSWER-Substances containing two or more different elements that are chemically bonded toge...

Question Answers Extra information Mark AO / Spec. Ref 01.1 any one from: • so elements / iodine / tellurium were in groups with similar properties • iodine has similar properties to Br / Cl / F / Group 7 • iodine has different properties to Se / S / O / Group 6 ignore reference to atomic structure ignore references to Cr, Mn and Mo allow corresponding argument in terms of tellurium 1 AO1 4.1.2.2 01.2 Mendeleev had predicted properties of missing elements element...

HESI A2 ENTRANCEEXAM FOR CHAMBERLAINCOLLGE OF NURSING 2023 QUESTIONS WITH ANSWERS CHEMISTRY HESI A2 CHEMISTRY V1/V2 FILE 1. If a Hydrogen isin a compound, what would its oxidation number be? +1 2. What isthe oxidation number of any simple ion? +1 or -1 depending on the charge of the ion 3. How many kilograms are in a pound? 0. kg 4. What is the temperature for freezing point of water in Celsius? 0 degrees Celsius (32°F for Fahrenheit) 5. What is the conversion of Celsius to Fah...

Module 3 1.Explain how scientific observations led to the development of the periodic table. Dmitri Mendeleev- first periodic table, organized 63 known elements according to properties, organized into rows and columns and wrote name, mass, chemical properties on each Henry Gwyn Jefferys- worke with Earnest Rutherford, experimented with 38 metals,he found in Mendeleev's periodic table ,led to modern definition of atomic number and the recognition the atomic number was to the periodic table...

RADIOLOGIC SCIENCE FOR TECHNOLOGISTS 11TH EDITION BUSHONG TEST BANKMULTIPLE CHOICE 1. The term “atom” was first used by the . a. Ethiopians b. British c. Greeks d. Romans ANS: C The term “atom” was first used by the Greeks DIF: Moderate REF: p. 27 OBJ: Relate the history of the term “atom.” 2. The first person to describe an element as being composed of identical atoms was . a. J. J. Thomson b. John Dalton c. Dmitri Mendeleev d. Niels Bohr ANS: B The first person t...

What is the charge of a proton? - +1 What is the charge of a neutron? - 0 What is the charge of an electron? - -1 What is the relative mass of a proton? - 1 What is the relative mass of a neutron? - 1 What is the relative mass of an electron? - Very small How many types of atoms do elements contain? - Only one type What are compounds? - Substances containing two or more different elements that are chemically bonded together What are mixtures? - Substances containing two or more differen...

AFOQT Physical Science Practice Test Questions and answers rated A+ 2023How do isotopes of the same element differ? - correct answer They have different number of neutrons Which scientist was responsible for developing the format of the modern periodic table? - correct answer Mendeleev Current, or the amount of electricity that is flowing, is measured in - correct answer Amperes or Amps What property of motion explains why passengers in a turning car feel pulled toward the outs...