A substance is considered extremely toxic if it has an LD50 of less than 5 mgs/kg of animal body weight. To humans, this is the equivalent of a taste (less than 7 drops). It is Highly toxic if it has an LD50 of between 5 and 50 mg/kg of animal body weight to a human, this would be about a teaspoon.
Radon in basements, lead in drinking water, exhausts from cars and chemicals released from landfills are just a few examples of toxic substances that can hurt you.
Botulinum toxin
Scientists differ about the relative toxicities of substances, but they seem to agree that botulinum toxin, produced by anaerobic bacteria, is the most toxic substance known.
Botulinum toxin, produced by Clostridium botulinum, is one of the most poisonous substance known.
Types of toxicity
There are generally three types of toxic entities; chemical, biological, and physical. Chemicals include inorganic substances such as lead, hydrofluoric acid, and chlorine gas, organic compounds such as methyl alcohol, most medications, and poisons from living things.
Toxicity category I is highly toxic and severely irritating, Toxicity category II is moderately toxic and moderately irritating, Toxicity category III is slightly toxic and slightly irritating, Toxicity category IV is practically non-toxic and not an irritant.
A toxic person is anyone whose behavior adds negativity and upset to your life. Many times, people who are toxic are dealing with their own stresses and traumas. To do this, they act in ways that don't present them in the best light and usually upset others along the way.
Lead is highly toxic and hence its use in various products, such as paints, gasoline, etc., has been considerably reduced nowadays.
Among the 118 elements present in the periodic table, Plutonium is the most dangerous element which is harmful to human health and environment. It is dangerous owing to its toxicity, radioactivity and high reactivity. Plutonium is a heavy element with atomic number 94 and mass number 239 (actinide metal).
Arsenic. Arsenic is a metalloid element that forms a number of poisonous compounds.
The toxic traits of a toxic person include unsupportive and unpleasant behavior, being manipulative, judgmental, controlling, and self-centered. Such people can be the cause of various negative feelings and emotions that you may be experiencing like depression, anxiousness, worthlessness, and unhappiness.
Some of the most common toxic traits include abusiveness, manipulation, being judgmental, dishonesty, and being generally unkind to others.
Abstract. Botulinum toxins, exotoxins of Clostridium botulinum, are the most toxic naturally occurring substances known to man.
Plutonium: A History of the World's Most Dangerous Element.
It's not illegal to own almost any element (plutonium and certain types of enriched uranium excepted), but there are very strict shipping restrictions for radioactive and otherwise potentially dangerous elements.
Arsine gas is the most toxic form of arsenic.
Thallium is tasteless and odorless and has been used by murderers as a difficult to detect poison.
The seven most deadly (to humans) chemical substances are: botulinum toxin A (from bacteria Clostridium botulinum) tetanus toxin A (from bacteria – Clostridium tetani) diphtheria toxin (from bacteria – Corynebacterium diphtheriae)
The four behaviours are Blaming, Contempt, Defensiveness and Stonewalling. Relationship expert Dr John Gottman termed these "The Four Horsemen of the Apocalypse" as they spell disaster for any personal or professional relationship.