Niels bohr Study guides, Class notes & Summaries

AQA GCSE Chemistry Paper 1 2023 Exam Questions With Complete Solutions What is an atom? - ANSWER Smallest part of an element that can exist What is an element? - ANSWER A substance made up of one type of atom How are elements represented? - ANSWER Using symbols, in the periodic table Approximately how many elements are there? - ANSWER 100 What is a compound? - ANSWER A substance made up of two or more elements chemically c...

AQA GCSE Chemistry - Paper 1 Correctly Answered 2023. 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 ...

AQA GCSE Chemistry - Paper 1 Questions And Answers 2024. What is the charge of a proton? - CORRECT ANSWER +1 What is the charge of a neutron? - CORRECT ANSWER 0 What is the charge of an electron? - CORRECT ANSWER -1 What is the relative mass of a proton? - CORRECT ANSWER 1 What is the relative mass of a neutron? - CORRECT ANSWER 1 What is the relative mass of an electron? - CORRECT ANSWER Very small How many types of atoms do elements contain? - CORRECT ANSWER Only one type ...

AQA 2023 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry questions and answers verified What is the equation linking mass moles and MR? Mass=moles * MR What is the definition of Ar (relative atomic mass)? The average mass of an atom of an element compared to the mass of one twelfth of carbon 12. What does Mr stand for? Relative molecular mass Define relative isotopic mass. The mass of an isotope of an element compared to the mass of one twelfth of the mass of carbon 12 ...

CLEP Chemistry Exam Questions & Answers 2024. John Dalton - correct answer Proposed that matter is composed of atoms; these atoms have different identities called elements, which combine to form compounds; measured masses of reactants and products. J.J. Thompson - correct answer Observed deflection of particles in a cathode ray tube; proposed that atoms are composed of positive and negative charges; developed the plum pudding model of the atom Robert Millikan - correct answer Calculated t...

FTCE Middle Grades Science 5-9 Exam 406 Questions with Verified Answers Which of the properties listed below is a characteristic of a liquid but not of a gas? A. It has the ability to flow. B. It maintains its volume in an open container. C. Its molecules are constantly in motion. D. Its volume varies depending on temperature. - CORRECT ANSWER B A 0.100 m3 chamber is filled with oxygen gas at standard conditions (101 kPa at 273 k). Assuming ideal conditions and behavior, what will be t...

What is the equation linking mass moles and MR? Mass=moles * MR What is the definition of Ar (relative atomic mass)? The average mass of an atom of an element compared to the mass of one twelfth of carbon 12. What does Mr stand for? Relative molecular mass Define relative isotopic mass. The mass of an isotope of an element compared to the mass of one twelfth of the mass of carbon 12 What is the relative mass of an electron? 1/1840 What is an isotope? Isotopes of an element are ato...

MTTC integrated Sciences 094 physical sciences graded A+ Plasma ionized gas that has some electrons that are described as free because they are not bound to an atom or molecule specific gravity measurement of the density of substances in a liquid compared to water atomic theory a theory that states that all matter is composed of tiny particles called atoms. John Dalton developed modern atomic theory negative ion anion, gains electrons positive ion cation; loses electrons ionic bo...

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...

Plasma - Answer ionized gas that has some electrons that are described as free because they are not bound to an atom or molecule specific gravity - Answer measurement of the density of substances in a liquid compared to water atomic theory - Answer a theory that states that all matter is composed of tiny particles called atoms. John Dalton - Answer developed modern atomic theory negative ion - Answer anion, gains electrons positive ion - Answer cation; loses electrons ionic bon...