Q. Approximately how many elements are known to us?

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Q. What constitutes the nucleus of the atom?

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Q. The charge on a proton is _____

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Q. The charge on Electron is _______

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Q. The charge on neutron is ______

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Q. The smallest part of an element that cannot exist as a free state is __________

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Q. What are positively charged Ions in a solution called?

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Q. Atoms of the same element or of different elements combine into larger units which are called ______

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Q. C₃H₆O₃ is the chemical formula for _____

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Q. Modern model of the atom shows that electrons are the outside nucleus in a region of high _______

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Q. Chemical symbol is the representation of _______

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Q. Smaller particles in atom are called ________

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Q. Most part of the atom is _______

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Q. Number of Protons and electrons in an atom are _______

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Q. An electric field deflects beams of _______

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Q. True about cow’s milk are all except:

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Q. What is the moisture content of cow milk?

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Q. What is the fat percentage of cow milk?

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Q. Milk is an emulsion of _____ in water.

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Q. In milk, the whey proteins are in _____ solution and the casein in colloidal suspension.

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