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Which symbol is the correct one? 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh In hydrogen peroxide (H2O2), the proportion of hydrogen and oxygen by mass is 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh In water, the proportion of oxygen and hydrogen by mass is 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh Which of the following elements has the same molecular mass as its atomic mass? 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The atoms of which of the following pair of elements are most likely to exist in free state? 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The scientist who proposed the first letter (or first letter and another letter) of the Latin or English name of an element as its symbol, was: 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh One nm is equal to: (a) 10^-9 nm (b) 10^-7 nm 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The law of constant proportion was given by: (a) Proust (b) Lavoisier (c) Dalton (d) Berzelius 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh If 1.4g of calcium oxide is formed by the complete decomposition of calcium carbonate, then the amount of calcium carbonate taken and the amount of carbon dioxide formed will be respectively 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The element having atomicity ‘four’ is most likely to be: (a) Argon (b) Fluorine (c) Phosphorus (d) Francium 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The law of conservation of mass was given by: (a) Dalton (b) Proust (c) Lavoisier (d) Berzelius 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The English name of an element is potassium, Its Latin name will be: 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh One of the following element has an atomicity of ‘one’. The element is: (a) Helium (b) Hydrogen (c) Sulphur (d) Ozone 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The atomic theory of matter was proposed by: (a) John Kennedy (b) Lavoisier (c) Proust (d) John Dalton 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The Latin language name of an element is natrium. The English name of this element is 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The symbol of a metal element which is used in making thermometers is: (a) Ag (b) Hg (c) Mg (d) Sg 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh The atomicities of ozone, sulphur, phosphorus and argon are respectively 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh Define atomic mass unit. What is its symbol? (b) Define atomic mass of an element. (c) What is meant by saying that ‘the atomic mass of oxygen is 16’? 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh What is an atom? How do atoms usually exist? (b) What is a molecule? Explain with an example. (c) What is the difference between the molecule of an element and the molecule of a compound? 3 years ago BidishaKashayap1333 class 9 atoms molecules lakhmir singh Page 1 / 5 1 2 3 4 5 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? Δ Home About Us Contact Us Privacy Policy Term of Use Copyright © 2020 Eanshub All Rights Reserved
