Uranium<span> (</span>92U<span>) is a </span>naturally occurring<span> radioactive element that has no stable isotopes but two primordial isotopes (</span>uranium-238<span> and </span>uranium-235<span>) that have long half-life and are </span>found<span> in appreciable quantity in the Earth's crust, along with the decay product </span>uranium-234<span>.</span>
B. Test a hypothesis by gathering data
Seriously though, what type of guy thinks "oh hey there's a transperent liquid in the science lab? yeah it's water."
A homogeneous mixture (every part of the solution has the same properties) ,a heterogenous mixture (there are two or more phases present). one example of a mixture is air. >hope this helps..
Reactivity of metals depends on the tendency to lose electrons. ... As we move down the group, the tendency to gain electrons decreases because as the atomic size increases, the effective nuclear charge decreases.
