in pure quantities, yes. in general atmosphere, no.
NO. Hydrogen gas is non-toxic. However, it can displace oxygen (and if hot enough burn in it) and thus can be an asphynxant in large quantities. But hydrogen by it self is not toxic at all.
Methyl mercury is more toxic to humans than inorganic mercury. Methyl mercury is a highly toxic organic form that can accumulate in living organisms and bioaccumulate in the food chain, leading to potential health risks when consumed by humans. Inorganic mercury compounds are generally less toxic and less likely to bioaccumulate.
Hydrogen gas itself is not poisonous, as it is a naturally occurring element and is non-toxic. However, hydrogen can be dangerous if it is in high concentrations in the air because it is highly flammable and can displace oxygen, leading to a potential risk of asphyxiation.
There is no difference between hydrogen sulfide and hydrogen sulphide. The term "sulfide" and "sulphide" both refer to the chemical compound H2S, also known as hydrogen sulfide. The difference in spelling is simply a matter of regional or historical variation.
Hydrogen gas is non-toxic but it is highly flammable (or explosive) so it could easily cause you to burn to death; in addition, if you were to breathe pure hydrogen you would die in a few minutes from lack of oxygen.
No. Hydrogen is not toxic.
Jupiter is a gas giant made primarily of hydrogen and helium, and it is not toxic in the way we typically think of toxic substances. However, the intense radiation and strong magnetic fields on Jupiter's surface would be lethal to humans without proper protection.
No, air plants are not toxic to humans.
Cedar is not toxic to humans or animals.
The question is toxic to what. Not all chemicals which are toxic to humans are toxic to bacteria, and some chemicals which are toxic to bacteria are harmless to humans (which is why we can have antibiotics). There are chemicals (like Hydrogen Sulfide) which are very toxic to mammals that SOME bacteria eat as food. But there are other chemicals like chlorine which are toxic to both humans and bacteria. So the question does not have a simple answer.
Yes, tin is generally considered to be non-toxic to humans.
Yes, the rhododendron plant is toxic to humans if ingested.
NO. Hydrogen gas is non-toxic. However, it can displace oxygen (and if hot enough burn in it) and thus can be an asphynxant in large quantities. But hydrogen by it self is not toxic at all.
No, almonds are not toxic to humans. They are a nutritious and safe food to consume in moderation.
Yes, Neptune's atmosphere is composed mostly of hydrogen, helium, and methane gases. The methane in the atmosphere absorbs red light, giving Neptune its cyan color. The concentration of methane in the atmosphere makes it toxic to humans.
Phenol is toxic and corrosive.
Hydrogen itself is not toxic, but high concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death. it is colorless and odorless. Check oxygen content before entering area. No odor warning if toxic concentrations are present. Measure hydrogen concentrations with suitable gas detector (a normal flammable gas detector is not suited for the purpose).