Who is rutherford Study guides, Class notes & Summaries

AQA AS Physical Chemistry Exam Questions and Answers Who described atoms as solid spheres that make up different elements and when? - Answer- John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - Answer- John Dalton in 1803 Who discovered the electron and when? - Answer- JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New model named plum puddin...

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...

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) - formula - answer CO3 (2-) Sulfate (ion) - formula - answer SO4 (2-) What do you leav...

AQA AS Physical Chemistry 2024 exam questions with 100% correct answers Who described atoms as solid spheres that make up different elements and when? - ANSWERS John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - ANSWERS John Dalton in 1803 Who discovered the electron and when? - ANSWERS JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New m...

Chemistry 1 Honors Final Exam Review 2024 with Correct Answers a broad generalization that explains a body of facts or phenomena - Answer- theory a testable statement - Answer- hypothesis a measure of the quantity of matter - Answer- mass a measure of the gravitational pull on matter - Answer- weight the closeness of measurements to the correct or accepted value of the quantity measured - Answer- accuracy the closeness of a set of measurements of the same quantity made in the same way - ...

What is an atom? - Ans .Smallest part of an element that can exist ▪ What is an element? - Ans .A substance made up of one type of atom ▪ How are elements represented? - Ans .Using symbols, in the periodic table ▪ Approximately how many elements are there? - Ans .100 ▪ What is a compound? - Ans .A substance made up of two or more elements chemically combined in fixed proportions ▪ How are the elements in a compound separated? - Ans .By chemical reaction ▪ How are chemical rea...

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...

IRRSP EXAM QUESTIONS ALL ANSWERED BY EXPERT CHAPTER 1 D. All the above - ANS 1. In the early years of Radiography, what caused personnel to be overexposed? A. Poor equipment design B. Lack of understanding C. Lack of and poor safety practices D. All the above D. Late in 1898 - ANS 2. In what year did Marie Curie discover Radium? A. The beginning of 1896 B. The end of 1897 C. The beginning of 1898 D. Late in 1898 A. Marie and Pierre Curie - ANS 3. Who coined the term ...

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) -...

Whig theory of the presidency - 'weak president' theory. The president is primarily an administrator, charged with carrying out the will of Congress. Per James Buchanan "My duty is to execute the laws...and not my individual opinions." Stewardship theory of the presidency - 'strong president' theory. Presidency is limited not by what the Constitution allows, but by what it prohibits. Presidents are free to act as they choose, as long as they do not violate the law. Theodore Roosev...