Answer:
half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive ...
Explanation:
braniest
Letter d, because they are both alkali metals (group one)
Answer: b
Explanation: the pressure from gravity in the inner core prevents the iron from melting to a liquid
Answer: $0.48
Explanation: $1.60×0.30= 0.48
