If the half-life of californium−250 is 13.1 years, approximately how much time will be required to reduce a 1.00−kg sample to about 1.00 g?

Stage in which a typical star has completely stopped fusion

How do you know when a chemical reaction has occurred

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.