lead
Most heavy metals, but not all, are not even required by human body and they cause problems even in a very small concentration. They often take same pathways as essential nutrients and so cause toxic effects. They also bioaccumulate and biomagnify
There have only been about 100 atoms of Hassium created, and the half life of the element is extremely short- so we do not know for sure. It is radioactive, and we expect it to act like other heavy metals, which are toxic.
Boron is not a dangerous or toxic chemical element.
Mercury is toxic - period. Not only when breathed. The point here is that mercury is so toxic that even small amounts can be harmful.
Arsenic hasn't been used in rat poisons in industrialized nations in many years. The reason for this is that arsenic, like other heavy metals, accumulates in the victim and in the environment. As such, it's an overly dangerous toxin. A "Toxic element" doesn't take into account the fundamental concept in toxicology -- dosage. Most anything is toxic in sufficient dosage. Arsenic, while indeed considered a dangerous poison, appears in trace amounts all over the environment. However, when someone asks me "What's a toxic element that was used in rat poison?", they usually want "Arsenic" as the answer. So, if this is for a test you're taking -- Yes:}.
Lead is a metallic element. It is comparatively heavy, but softer than many metals and has a lower melting point. In high concentrations, it is toxic to living organisms.
It is metallic, lustrous and toxic. It is used for plating and for pigment manufacture
Vanadium is a soft silvery white toxic metallic element used in steel alloys. Cobalt is a hard ferromagnetic silver-white bivalent or trivalent metallic element. Strontium is a soft silver-white or yellowish metallic element of the alkali metal group.
The end products of uranium isotopes decay chain are the isotopes of lead.
Most heavy metals, but not all, are not even required by human body and they cause problems even in a very small concentration. They often take same pathways as essential nutrients and so cause toxic effects. They also bioaccumulate and biomagnify
Recent events would suggest Polonium Po as the most lethal non-metllic element. see link.
All the decay chain isotopes are radioactive and toxic (excepting the last member which is non-radioactive but also toxic); you think probably to radium or polonium.
atom Be is the abbreviation for beryllium, a light strong brittle grey toxic bivalent metallic element having atomic number 4.
ArsenicBenzeneBeryllium (a toxic metal)1,3-Butadiene (a hazardous gas)Cadmium (a toxic metal)Chromium (a metallic element)Ethylene oxideNickel (a metallic element)Polonium-210 (a radioactive chemical element)Vinyl chlorideOther toxic chemicals in tobacco smoke are suspected to cause cancer, including the following (3):FormaldehydeBenzo[α]pyreneTolueneMost of the above are absorbed by the tobacco plant from the environment, so they are also present in the "healthy" fruit and vegetables we are encouraged to eat.Incidentally, seventeen chemicals found in coffee have been "linked to cancer".
Silicon is a metalloid (Not metallic) element with the Symbol Si and Atomic number 14. It is slightly essential for life, and it is required for the growth of rice. Oh and most of its compounds are only slightly toxic, and the rest are just really toxic. Source: Wikipedia and my dad.
Uranium is a natural chemical element, metal, solid, radioactive, toxic, in the actinoids group, heavy atomic weight, high density.
it used to be lead, but most are steel now for environmental reasons. lead is a poison: a toxic heavy metal.