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小宝:我国第二颗探月卫星常娥二号于2010年10月1日18时59分57秒成功发射,真是壮国威,振民心!不久前我在报上读到,月球上氦3蕴藏丰富,达上百万吨。预期三五十年后,8 t氦3可提供全中国目前1年的能量需求。这条新闻引发了我许多问题,请牛老师解惑。我的第一个问题:氦3是什么?牛老师:氦3的原子核由2个质子和1个中子构成。2个质子说明它是元素周期系第2号元素,因而称为氦,而氦3的3是指它的质量数,即质子数和中子数之和为3。通常我们说的
Xiao Bao: China's second moon satellite Chang'e II was successfully launched at 18:59:57 on October 1, 2010, and it was really strong. Soon when I read in the newspaper, the moon was helium 3 Rich reserves, reaching millions of tons. It is expected that in the next three or five decades, 8 t of helium 3 will provide the current 1-year energy demand in China. This news has caused many problems for me, please Niu teacher doubts. My First Question: What is Helium 3? Cattle Teacher: The nucleus of helium 3 consists of two protons and one neutron. The two protons indicate that it is element 2 of the periodic system of elements and is therefore called helium, whereas the 3 of helium 3 refers to its mass, that is, the sum of the number of protons and neutrons is three. Usually we say that