Isotopes, atoms of the same element with same number of protons, different number of neutrons, Mass number, Number of protons and neutrons, Atomic , This number gives information about number of protons, Pure, Same type of particles or atoms, Compound, Atoms of different elements bonded to each other in a fixed ratio, Funnel, Used in filtration that goes in the neck of conical flask, Lithium, Group 1 element less reactive than Na, Increases, Reactivity in Group 1 elements ________down the group, Potassium, Gives a purple flame when reacts with water, Hydrogen, Gas given off when alkali metals react with water, Orange, When KBr reacts with Cl2, the solution colour goes to, Brown, When KI reacts with Cl2, the solution colour goes to , displacement, Reactions that halogen go under, Iodine, Halogen with biggest atomic size, Flourine, Most reactive halogen, Francium, Most reactive alkali metal, Nitrogen, Atom in period 2 and group 5, Aluminium, Atom in period 3 with 3 electrons in the outer shell, Neon, Noble gas in period 2, Rubudium, Alkali metal in period 5.

Atomic structure, Group1+7

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