The half life of a radioactive element is the time needed to the element to decay and reach the half amount of the initial amount. Here we have a radioisotope element which decays its half from 10,000 to 5,000 in two days. Therefore, its half life is 2 days.
Answer:
17)c: the reactivity of a metal.
Explanation:
Answer:
B. Interferon
Explanation:
interferon targets any lingering melanoma cells and prevents them from spreading and growing.
There are 32 valence electrons for the Lewis structure for ClO4
The model of the atom has dramatically changed over many many years.We learned atoms make up different substances and are the smallest particles of matter, which have subatomic particles that are very small portions of matter. At first scientist only thought there were electrons which are negatively charged.
