![]() ![]() An atom or a group of atoms which carries positive or negative charge is called an. The combining power of an element is known as its. Elements are represented by symbols and molecules by. and that of ammonium sulphate is Answerĥ. The formula unit mass of Ca 3(PO 4) 2 is AnswerĪnswer: (3 × atomic mass of calcium) + (2 × atomic mass of phosphorus) + (8 × atomic mass of oxygen) = 310Ĥ. A group of atoms carrying a fixed charge on them is called. In a chemical reaction, the sum of the masses of the reactants and products remain unchanged. The molecule having an atomicity of 4 is:ġ. The number of oxygen atoms in 4.4 g of CO 2 is approx. How many times an atom of sulphur is heavier than an atom of carbon? ![]() What mass of carbon dioxide (CO 2) will contain 3.011 × 10 23 molecules? Percentage of calcium in calcium carbonate is Which of the following has maximum number of atom? The relative molecular mass of Na 2S 2O 3.5H 2O is (c) when energy is either given to, or taken out from the systemĪnswer: (c) when energy is either given to, or taken out from the system (b) only when energy is taken out from the system (a) only when energy is given to the system The number of oxygen atoms in the solution areĪ change in the physical state can be brought about Which of the following correctly represents 360 g of water?ģ.42 g of sucrose are dissolved in 18 g of water in a beaker. Which of the following has maximum number of atoms? Which of the following would weigh the highest? Atoms and Molecules Class 9 MCQs Questions with Answers We have Provided Atoms and Molecules Class 9 Science MCQs Questions with Answers to help students understand the concept very well. ![]() MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. Check the below NCERT MCQ Questions for Class 9 Science Chapter 3 Atoms and Molecules with Answers Pdf free download.
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