Yes, check the package for it.
Iodized salt usually is a form of processed table salt, of which the grains are very fine (about 1/8 of a cubic millimeter each). Kosher salt (iodized or not) is salt that is used for koshering meat. Its grains are considerably larger than those of table salt (though sizes of Kosher salt grains vary).
Kosher salt is free of iodine, and additive-free.
Pickling salt is the same as table salt but without iodine and caking agents added. Salt that is labeled "kosher salt" may be free of these additives and can be used in place of pickling salt but you'd have to check the package labeling to confirm the lack of additives.
No, salt is mainly Sodium. Iodine is added to salt to prevent iodine deficiency.
Nutritionally there is no difference between these two types of salt. Kosher salt is a larger grain type of salt; it is certified Kosher and can be used to prepare meals, for home canning and can be ground to be used as a table salt.
"Kosher salt" is chemically the same as regular table salt, sodium chloride. It's not that the salt itself is kosher (it is, but so is just about any pure table salt). It's really more "koshering salt" ... suitable for use in salting meat to make it kosher (by removing the blood). Kosher salt is usually physically, not chemically, different from regular table salt. The grains tend to be larger and in the form of flat flakes rather than tiny cubes. Kosher salt usually contains no additives such as iodine (regular table salt is often sold with added iodine, usually labelled "iodized salt").
Goiter is a problem with the thyroid gland, most commonly caused by an iodine-deficiency disease. You can prevent or cure it by eating seafoods which are rich in iodine, or by using iodized table salt.
Yes. The substance itself is intrinsically kosher. The only question might arise if the sea salt is processed or packaged on machinery, or in a facility, where it could come in contact with non-kosher ingredients of other products.
All salt is kosher unless something is added to it that isn't kosher. Kosher salt is just a large grained salt. Use the same amount of any salt.
Most salt is kosher by default unless additives such as flavourings are added, at that point the salt would have to be certified kosher. 'Kosher salt' refers to a large grain salt that is used during the process of kashering meat. Iodized salt is kosher.
Sea salt does not have iodine added to it. The only salt that has iodine in it says iodized, such as table salt.
Kosher salt has larger, coarser grains compared to regular table salt. This makes it easier to pinch and sprinkle evenly over food. Additionally, kosher salt does not contain any additives like iodine, which can affect the taste of the food.