Which of the following particles or rays requires barriers of lead and/or concre

Question

Which of the following particles or rays requires barriers of lead and/or concrete for protection? beta particle alpha particle gamma ray Positron X-rays What particle or nucleus X is needed to complete the following equation: beta particle uranium-235 positron alpha gamma rays Which of the following electromagnetic radiations are nonionizing radiations Radio and microwaves infrared and X-rays Gamma and X-rays All of them7. Which of the following statements is true? A. 37 curie = 3.7 times 10^10 disintegrations per second B. 1 becquerel = 100 disintegration per second The gray (Gy) is the SI unit of radiation dose all How Long Does It Take in years for a 1.80 mol Sample of Th-228 to Decay to 0.225 mol? (Half-Life1.9 Years.) 1.9 5.7 about 8 15.2 years Practice Mdash Radon-222 Is a Gas that Is Suspected of Causing Lung Cancer as It Leaks into Houses. It I Produced by Uranium Decay. Assuming No Loss or Gain from Leakage, if There Is 1024 g of Rn-22 in the House Today, How Much Will There be in 5.4 Weeks? (Rn-222 Half-Life Is 3.8 Days.) 1 gram 4 gram 500 gram 16 grams none of the above To produce fissionable uranium the natural uranium must be enriched in U-235: about 7% for "weapons grade."To about 3% for "reactor grade." True false When the isotope undergoes alpha decay, the product isotope is _______.^212_81TI^212_79Au^214_84Po^210_81TI^210_81TI^214m_83Bi

Explanation / Answer

Q4.

gamma + X-rays -- >concrete (since nucleus will stop/absorb the rays)

all other particles ar enot likely to be stopped

Q5.

X -->

proton count = 86-54 = 2 protons

neutron count = 210-206 = 4 - 2 = 2neutrons

so.. 4/2

this must be alpha particle

Q6

nonionizing --> all wavlengtths lower than that of visible light, so

a) infrared and x-rays

c) gamma and x-rays

are ionizing

so choose a) radio and microwaves

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