Radon (Rn)
Uranium and ummm something else
Alkali Metals, except for Hydrogen, which is a Nonmetal.
The alkali metals are the group 1 elements on the periodic table, except for hydrogen, which is a nonmetal.
Radioactive metals like uranium, titanium which emit alpha, beta & gamma rays.
The non-metal you are referring to is radon. Radon is a colorless, odorless, and tasteless radioactive gas that is formed as a decay product of uranium and thorium. It is usually found in soil, rock, and groundwater and can seep into buildings, posing a health risk.
Lead is commonly used to absorb radioactive rays due to its high density and ability to effectively block radiation. Other metals such as tungsten and uranium can also absorb radioactive rays to varying degrees.
No. All elements with atomic number greater than 83 are radioactive, including some metals such as polonium, uranium, etc. But there are radioactive isotopes of most metals on the periodic table but are very rare and sometimes must be produced in reactor or particle accelerator.
The following metals are involved in nuclear reactions. The preferred metal is Uranium 235. The next one is Plutonium 239. Important radioactive metals are Thorium and Cobalt 60. Important radioactive elements that are not metals include Radon and Iodine.
Some radioactive metals are advantageous because they are useful. Certain radioactive metals like cobalt-60 are used as gamma ray sources for portable X-ray equipment, and to sterilize foods and other products. The most common use of radioactive metals is the use of uranium in nuclear reactors, principally to generate electric power. Radioactive metals are used as thermoelectric generators in space probes that travel far from the sun (because solar panels won't work far out). And these are just a few of their uses.
Vinegar (acetic acid) can react with some reactive metals as alkaline metals.
Both are chemical elements, solid, metals, radioactive, having fissile isotopes, chemically reactive, toxic etc.
Uranium-235 and uranium-238 are natural, radioactive isotopes of uranium; they have 92 protons and electrons but the number of neutrons is different: - for 235U: 143 - for 238U: 146