Gradiationscarry nochargeandareattracted

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Unformatted text preview: ¾ dau hter + radiation ® g · The three different kinds of radiat ions can be dist inguished by their interactions with an electric field. · a­Radiations carry a positive charge and are attracted to the negat ive plate. · b­radiations carry a negative charge and are attracted to the posit ive plate. · g­radiations carry no charge and are attracted to neither plate. · The three different kinds of radiat ion have different energies and penetration abilit ies. · a­Rays have low energy and can be blocked by a thin sheet of paper. · β­Rays have moderate energy and can be blocked by a thin sheet of metal. · γ­Rays have high energy and can only be blocked by a thick sheet of lead. 2 Chemistry 52 Chapter 18 ALPHA & BETA DECAYS · Alpha decay occurs when a nucleus changes into another nucleus and gives off an a­ particle, which is a helium nucleus 4 He . ( 2 ) Th ¾¾ 228 Ra + 4 He ® 88 2 232 90 · Note that the sum of the atomic numbers and the mass numbers on the left and the right side of the equation are equal. · Loss of alpha particle from the nucleus results in loss of 4 in ma...
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