Đang chuẩn bị liên kết để tải về tài liệu:
Thea writting review 5

Tham khảo tài liệu 'thea writting review 5', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | THEA PRACTICE EXAM 2 the daughters are not inert because they are highly sensitive to their surroundings and are chemically active. Thus when the daughters enter buildings attach to clothing mingle with dust particles or are inhaled health risks increase dramatically. Radon exists across the United States with somewhat higher amounts located in areas where granite is common. 3 Radon gas released directly into the atmosphere poses slight health risks. Conversely when it is trapped and has the opportunity to accumulate such as beneath houses and other structures risks increase significantly. This colorless tasteless and odorless element can seep into buildings through walls soil water supplies and natural gas pipelines. It can also be part of the properties of materials such as brick wallboard and concrete. When radon is prevalent in a building it circulates in that building s air exchange and is inhaled by humans. 4 The majority of the radon daughters exhibit electrostatic qualities as they attach to items such as clothing furniture and dust a magnetic process known as plating out. The remainder of the daughters do not attach to anything. As an individual breathes the potentially damaging air the attached and unattached daughters enter the body. As the daughters travel through the body particles become attached to the respiratory tract the bronchial region the nose and the throat. Some particles are expelled during exhalation but most remain within the individual. 5 The unattached daughters are the most dangerous as their untethered route often carries them directly to the lungs. They deposit significantly more radioactivity than the attached daughters indeed up to 40 times as much. Research indicates that those individuals who breathe primarily through their noses receive fewer doses than those who breathe primarily through their mouths. 6 Alpha radiation begins penetrating the lungs and other organs after radon daughters settle there. Penetration and the .