The half-life for the radioactive decay of c-14 is 5730 years and is independent of the initial concentration. how long does it take for 25% of the c-14 atoms in a sample of c-14 to decay? if a sample of c-14 initially contains 1.5 mmol of c-14, how many millimoles are left after 2255 years?

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.