They are both legumes but they are in completely different geni, soybean (Glycine max) is from the Glycine genus, and mung bean (Vigna radiata) from the Vigna genus, both of which are different from the traditional bean (Phaseolus genus).
The confusion came from the fact that sprouted mung beans were at times sold as "soybean" sprouts. Mung beans used for bean sprouts have a green skin, while the soybean, which is about twice bigger, is white or yellow.
Vigna radiata is the scientific name of the Mung Bean
monggo seeds
The Monggo Seed, also called Mongo Seed, Mongo Bean, Mungo Bean, and Mung Bean has the "scientific" name: Vigna Radiata. It is from the Dicot Group of the Fabaceae Family.
A mung bean seed (monggo seed) is typically about 3-4 millimeters in diameter.
Monggo beans are considered to be homogeneous because they are of the same type and have similar characteristics. Each monggo bean in a batch would generally have consistent properties and composition.
soy bean stew/soup
soy bean
Yes there are two syllables. Soy-bean.
Soy, or soya, is a bean; however, many soy products are only components of soy (such as oil or protein isolates).
Brazil
no
It is another name for tofu.