Uranium is radioactive. Which means its nucleus will emitt an alpha particle (two protons and two neutrons) spontaneously. Because the nucleus lost two protons it becomes the element Thorium. Thorium also emitts alpha's and changes to Radium. This process continues; Radium into Radon into Polonium and finally into lead. The final Lead is not radioactive and the process ends. The actual process is a little more complicated because some of these intermediate elements can change by converting a neutron into a proton and emitting an electron (beta radiation), but the basic process is one radioactive element changes into another radioactive element by emitting radiation (alpha's or beta's). The Uranium to Lead Process has a half-life of about 4.5 billion years. Meaning that in 4.5 billion years 1 kilogram of Uranium will have changed to a half kilogram lead and a half kilogram Uranium is still left. This is approximate because there will also be some of those intermediate elements waiting to change.
Decay
Because in the past was an uranium mine near this small village.
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Lead screws (always pronounced "LEED," as in the present tense of the verb "to lead") are used in mechanical transmission systems to convert rotary motion to controlled linear motion. A common example is in the machinist's screw-cutting lathe. Here a motor turns the lathe's headstock to rotate the piece being machined. A train of gears connected to the headstock turns the lead screw which is usually as long as the entire lathe. As the lead screw turns it propels the cutting tool along the workpiece at a rate directly linked to the rotation of the headstock.
iron, copper, lead, zinc, gold, silver, tungsten, uranium, arsenic, feldspar, timber, and hydro power.
Yes, the USA has some but Canada is the worlds largest producer. and likely has the largest reserves.
It is uranium that is changed into lead during radioactive decay. Note that there are a number of intermediate steps in the conversion of uranium into stable lead. The uranium does not change directly into lead. The uranium atom undergoes decay, and a radioactive daughter product appears. This continues with radioactive daughters appearing at the end of every step - until lead appears.
Since you have stated that the uranium is pure, it is therefore all uranium and contains no lead; lead is not uranium.
Uranium has a half life of 5,600 years. After that period, one half of the uranium becomes lead. That is why lead is found in uranium deposits.
Isotopes of lead are the final products of the decay chain of uranium.
Uranium becomes lead
Yes, uranium is more dense (heavier) than lead.
the uranium-lead method is a method to determanie the age of Earth's oldest rocks
no
The decay chain in the uranium 238 series (also called radium series) id lead 206 (stable isotope).
Uranium eventually breaks down into lead.
Because the end products of uranium decays series are stable isotopes of lead.
The uranium decay chain ends with lead stable isotopes.