Isra is analyzing the properties of several samples of elements to find out which sample is a metalloid, which set of
properties most likely belongs only to a metalloid?
forms basic compounds and is a solid
has a high luster and is very brittle
is a gas and has low electrical conductivity
brittle and forms acidic compounds

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

a sonic boom is a loud boom that breaks the sound barrier

explanation: