If a radioactive material has a 10 year half-life, how much of a 100 g sample will be left after 30 years? a) 50 g b) 6.25 g c) 12.50 g d) 25 g

Which of the following statements concerning the influence of culture on ethnic identity formation is accurate? a. one will reject ethnic identity if cultural stereotypes are encountered. b. if one’s ethnic city is different from the dominant cultural group, then one’s ethnic identity you will become weekend. c. if an the ethnic group is excepted by dominant culture, then ethnic identity formation can be a difficult process. d. similarity to the dominant culture can determine how easy it is for one to except ethnic differences.

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.