Mendeleev Study guides, Class notes & Summaries

Intensive property A physical property of a substance that is not dependent on the size of mass of a sample, and cannot be determined by looking at the substance. Ex: density, mp, bp, temperature. Extensive property A physical property that depends on the amount of matter in a sample. Ex: mass, volume. Chemical property How a substance will change when it reacts with other substances and changes its chemical identity. Ex: flammability, oxidation state, toxicity. Periodic table -Arranged...

IPC practice test questionsPeriods - correct answer Each horizontal row of the periodic table. Groups / families - correct answer Each vertical column. Have similar chemical properties and similar electron configurations. Demitri Mendeleev - correct answer Made the first periodic table. He was writing a textbook and wanted to organize the 63 elements known at that time. He based his organization similar to the card game of solitaire. Increasing mass - correct answer Mendeleev organized ...

GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 2024/2025 QUESTION PAPER ALREADY PASSED What does 'aq' mean? - answer Aqueous - it is dissolved in water Water - formula - answer H20 Ammonia - formula - answer NH3 Carbon Dioxide - formula - answer CO2 Hydrogen - formula - answer H2 Chlorine - formula - answer Cl2 Oxygen - formula - answer O2 Ammonium (ion) - formula - answer NH4 (+) Hydroxide (ion) - formula - answer OH (-) Nitrate (ion) - formula - answer NO3 (-) Carbonate (ion) -...

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 the ratio of elements in a ...

AFOQT Physical Science Practice Test Questions with complete solution 2023/2024How 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 t...

SOLVED-|Elaborated|Edexcel A level Chemistry Paper 2 Marking Scheme-June 2022 Edexcel A level Chemistry Paper 2 Marking Scheme-June 2022Proton c/m? - Ans>+1, 1 Neutron c/m? - Ans>0, 1 Electron c/m? - Ans>-1, 1/1500 Mass number? - Ans>Num of protons + neutrons Atomic number? - Ans>Num protons Isotope? - Ans>Different atom of the same element, same num protons. Diff number neutrons. Mendeleev vs Now? - Ans>Mendeleev: Gaps for elements, No noble gases, fewer elements. Both had...

There are ________ unique substances (elements) arranged on an amazing chart that reveals their hidden secrets to anyone who knows how to read it. 118 All the gold ever mined would fit into a single cube about _______ feet on a side. 60 Three-quarters of the elements are ________________. metals How an atom reacts chemically depends on how willing it is to share _________________ with others. electrons How much would a 60 pound block of gold be worth in dollars? $...

2 © OCR 2023 1 The diagram shows part of Mendeleev’s Periodic Table. B 11 C 12 N 14 O 16 F 19 Al 27 Si 28 P 31 S 32 Cl 35.5 As 75 Se 79 Br 80 In 115 Sn 119 Sb 122 Te 128 I 127 (a) Give the symbols of the two elements shown in the diagram which are not in order of atomic mass. ........................................................... and ........................................................... [1] (b) Mendeleev left gaps for elements that had not ...

How 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 outside of the turn? - correct answer -inertia According to the Ideal Gas Law, ...

0 1 This question is about the periodic table. In the 19th century, some scientists tried to classify the elements by arranging them in order of their atomic weights. Figure 1 shows the periodic table Mendeleev produced in 1869. His periodic table was more widely accepted than previous versions . 1 The atomic weight of tellurium (Te) is 128 and that of iodine (I) is 127 Why did Mendeleev reverse the order of these two elements? . 2 Mendeleev left spaces marked with an asterisk * He left...