1 Metals are said to be fusible, resulting in some confusion in old chemistry as to whether arsenic was a true metal, or a nonmetal, or something in between. 2  It sublimes rather than melts at standard atmospheric pressure, like the nonmetals carbon and red phosphorus.
Growth During the Third Trimester. The third trimester of pregnancy brings about rapid development of your unborn baby. The beginning of the seventh month also marks the third trimester. The seventh month of pregnancy typically begins at week 27, according to KidsHealth.
In a healthy infant, the most rapid growth occurs in the first six months after birth. Brain weight doubles by four to six months and triples by a baby's first birthday. By age two, the brain is about 80 percent of adult size, said Zecavati. If a child doesn't meet those benchmarks, microcephaly is a concern.