Moles avogadro - Study guides, Class notes & Summaries

AQA GCSE Chemistry Paper 1 What is an *atom*? - ANS smallest part of an element What is an *element*? - ANS a substance that contains only one type of atom What are *chemical symbols*? - ANS - the letter or pair of letters that represents an element. - first letter is always capitalized What are *compounds*? - ANS substances in which atoms of two or more elements, which are chemically combined What is a *chemical formula*? - ANS a combination of symbols that shows t...

Chapter 3—Atoms and Elements MULTIPLE CHOICE 1. The most abundant element in the earth's crust by mass is: a. Hydrogen b. Carbon c. Oxygen d. Silicon e. Nitrogen ANS: C 2. Which of these statements about atoms is incorrect? a. Atoms are the smallest visible amount of an element. b. Atoms are composed of protons, neutrons, and electrons. c. Atoms are the building blocks of all matter. d. Atoms are the smallest identifiable unit of an element. e. There are 90 different naturally oc...

Activity: Moles, Avogadro, and Molar Mass Prior Knowledge Questions 1. In the image, note a dozen eggs, a dozen donuts and a dozen roses. How many of each item do you have? 12 eggs, 12 donuts, and 12 roses. 2. Would a dozen of each object have the same mass? No 3. Suppose you have a doz...

Quantitative Chemical Analysis Exam Questions Answered Correctly (Graded A+) Branch of analytical chemistry that deals with determination of an unknown chemical species in a sample - Answers Qualitative analysis Which branch of analytical chemistry deals with the determination of the amount of the unknown chemical species in a sample - Answers Quantitative analysis What are the SI units? - Answers Length- Meter Mass- Kilogram Time- Second Temperature- Kelvin Amount of Substance- Mole Ele...

isotopes atoms of the same element with different numbers of neutrons atomic (proton) number the number of protons in the nucleus of an atom 00:03 01:39 mass (nucleon) number the number of particles (protons and neutrons) in the nucleus ion a positively or negatively charged atom or (covalently bonded) group of atoms (molecular ion) relative isotopic mass the mass of an atom of an isotope compared with one twelfth of the mass of an atom of carbon-12 ...

Chapter 03 - Atoms and Elements 1. The most abundant element in the earth's crust by mass is: a. Hydrogen b. Carbon c. Oxygen d. Silicon e. Nitrogen ANSWER: POINTS: 2. Which of these statements about atoms is incorrect? a. Atoms are the smallest visible amount of an element. b. Atoms are composed of protons, neutrons, and electrons. c. Atoms are the building blocks of all matter. d. Atoms are the smallest identifiable unit of an element. e. There are 91 different naturally occurrin...

Student Exploration: Moles Vocabulary: atomic mass, Avogadro constant, conversion factor, dimensional analysis, mole, molar mass, molecular mass, scientific notation, significant figures, unified atomic mass unit Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. In the image to th...

what happens to the solubility of gases as pressure increases? increases what happens to the solubility of gases as temperature increases? decreases how is the chromatography retardation factor calculated? distance moved by compound/distance moved by solvent how is the relative atomic mass of an element calculated? (mass1 x abundance1) + (mass2 x abundance2)/ 100 what are the elements in group 1 referred to as? alkali metals what are the elements in group 7 referred to as? halogens what are the ...

Student Exploration: Moles Vocabulary: atomic mass, Avogadro constant, conversion factor, dimensional analysis, mole, molar mass, molecular mass, scientific notation, significant figures, unified atomic mass unit Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. In the image to the right, note a dozen eggs, a dozen donuts and a dozen roses. How many of each item do you have? 2. Would a dozen of each object have the same mass? 3. Suppose you have a dozen carbon atoms, a dozen gold a...

EDEXCEL CHEMISTRY PAPER 2, question and answer, verified Proton c/m? +1, 1 Neutron c/m? 0, 1 Electron c/m? -1, 1/1500 Mass number? Num of protons + neutrons Atomic number? Num protons Isotope? Different atom of the same element, same num protons. Diff number neutrons. Mendeleev vs Now? Mendeleev: Gaps for elements, No noble gases, fewer elements. Both had metals and non-metals. Both had groups/periods Periods? Rows, Increasing atomic m...