Place these events from Chinese history in chronological order. Tiles The Ming dynasty is established. Ming leaders end overseas voyages and foreign exchanges. Zheng He makes his first overseas voyage. Canton is opened to Portuguese traders. Expansion of the Great Wall begins. The Mongol-led Yuan dynasty ends.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

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