However, some of the minerals contain xenon isotope s unlike those usually produced by radioactive decay of uranium

然而无码全黄性涩视频在线，有些含氙同位素的礦物并非如此，是由鈾的放射性衰變產(chǎn)生的www.sdh68.com。

The immediate product of the radioactive decay of an element.

一種堿金屬屬的放射性元素偷窥国产综合，是錒瓦解的產(chǎn)物。

Atoms in a radioactive substance decay in a random fashion but at a characteristic rate.

原子的放射性物質(zhì)衰變的隨機(jī)方式国产超级碰，但利率的一個(gè)特點(diǎn)操操操草草草。

Beneath the Earth's crust lies the mantle which is heated by the radioactive decay of heavy elements.

地殼的下面是地幔，由于有重元素的放射衰變活動(dòng)所以溫度較高91亚洲精品在线免费。

Geological dates are usually obtained by using the rates of decay of various radioactive elements found in minerals.

人們通常用礦物中所發(fā)現(xiàn)的各種放射性元素的衰變率來計(jì)算地質(zhì)年代天天免费操一操。

Each element has at least one isotope with unstable nuclei that can undergo radioactive decay .

每個(gè)元素至少有一個(gè)同位素不穩(wěn)定原子核可以進(jìn)行放射性衰變。

Tp the time required for one-half of the atoms in a group of radioactive atoms to decay.

放射性藥物radiopharmaceuticals是指藥物的本身含有放射性核素美女被操免费黄色网站，用于人體疾病的診斷與治療的特殊藥物99热99re6国产在线播放。

Scientists now believe it is a combination of radioactive decay and tidal heating [ 59 ] [ 60 ] , as tidal heating alone is not enough to explain the heat.

科學(xué)家現(xiàn)在相信，這是放射性衰變和潮汐熱 [59] [60]的組合亚洲专区在线观看无码，如潮汐熱不足以解釋熱量玖玖玖在线精品免费视频。

Such superheavy elements are usually very radioactive and decay away almost instantly.

這種超重元素通常是具有非常強(qiáng)的放射性，并且?guī)缀趿⒓磿?huì)發(fā)生衰變亚洲欧美一区二区日韩另。

Chemistry also uses calculus in determining reaction rates and radioactive decay.

化學(xué)也使用演算在確定反應(yīng)速率和放射性衰變三级日韩欧美第一页。