neciababy neciababy

16-05-2016
Chemistry

contestada

If 25% of a radioactive element remains after 1,000 years, what is the half-life?

Respuesta :

16-05-2016

The half-life would be 500 years.

25% means that 2 half-lives have already passed. So one half-life is 500 years.

Answer Link

Otras preguntas

State laws that restrict the right to vote to people over the age of 18 are an example of ________.

Part B: Complete the forms of the verb ir –to go. 1. Yo -_____ 2. Ella -_____ 3. Tú -_____ 4. Nosotros -_____ 5. Ellos -_____ 6. Usted -_____ 7.

Which term refers to a part of an ocean or a sea that is surrounded on three sides by land?

What is the value of the expression? −2/9−(−1/3÷3/5) Enter your answer, as a fraction in simplest form, in the box.

HELP ME PLEASE!!!!!!!!!!!!!!!!!!!!!!!!! What form of government did the Sumerians have? A. Monarchy B. Republic C. Democracy

17u-8u=18 Can u explain how this works

what new events have further complicated the conflict in Kashmir? A. An incursion by China into the northern territory of Kashmir has added a new player in the

Claire bought 180 candies and 140 pens for goody bags for her birthday. What is the largest number of goody bags that Claire can make so that each goody bag has

what impressed soldiers most about George Washington's leadership during the revolutionary war A. He endured the same hardships as his men B. He met regularly

write y =-0.4x + 0.3 in standard form using integers