physical
Phosphorus is an element that can burn without oxygen through a process called spontaneous combustion. When exposed to air, phosphorus can react with the oxygen in the air to produce phosphorus oxide and ignite.
It is not possible to burn yourself with salt. Salt is a compound that does not burn or react in a way that would cause a burn on the skin.
Burning is a reaction with oxygen, an oxydation; americium can react with oxygen.
No. If you burn an element, you will turn it into a compound (most commonly [element burnt] oxide). Which will not be an element.
no as it will burn out the element
Fuels react with oxygen gas when they burn, producing carbon dioxide, water, and heat as byproducts.
no magnesium doesn't react with pure H2O
It is possible for a fire to "burn" under water, but it's probably an "unusual case" where a combustible metal is involved. Some metals, like the alkali metals from Group 1 of the periodic table, will react with water. They can actually "burn" under water because they react with the water taking oxygen. And if you guessed that water cannot be used to extinguish these metals if they are burning in air, you would be correct.
physical
No, pure gold is not flammable. Gold is a very stable element and does not react with oxygen in the air at normal temperatures, so it does not burn.
Water vapor itself cannot burn, as it is already in the form of a gas. However, if heated enough, it can dissociate into hydrogen and oxygen, allowing these gases to burn.
Iodine does not react with itself under normal conditions because it is a non-metal element that exists naturally as diatomic molecules (I2). However, it can react with other substances to form compounds.
Germanium is not flammable as it does not react with oxygen in the air to ignite or burn. It is a metalloid element commonly used in semiconductors and electronic devices.
Phosphorus is an element that can burn without oxygen through a process called spontaneous combustion. When exposed to air, phosphorus can react with the oxygen in the air to produce phosphorus oxide and ignite.
ice water
No, xenon does not burn. It is a noble gas that is chemically inert and does not readily react with other substances.