natalieraudet natalieraudet

23-03-2020
Chemistry

contestada

If 50% of a radioactive element remains after 4000 years, what is the half-life?

Respuesta :

Mistystar4881 Mistystar4881

27-03-2020

Hey there!

A half-life means after a certain amount of time, half of that substance will be gone/changed after that time.

If 50%, or half, of the element remains after 4000 years, that means the half life must be 4000 years.

Hope this helps!

Answer Link

Otras preguntas

Compound X absorbs photons with a wavelength of 179.3 nm. What is the increase in energy of a 0.115 M solution of compound X in which a mole of photons are abso

Please answer this in two minutes

In the story, Victor is finally able to impress Teresa. Do you think it matters that this impression is based on something that isn’t true? (The story is sevent

Assume that a lightning bolt can be represented by a long straight line of current. If 15.0 C of charge passes by in a time of 1.5·10-3s, what is the magnitude

27. Theodore had 24 baseball cards. He sells 1/4 of his cardsto Tom, 13 of his cards to Larry. How many baseball cardsdoes Theodore have left?(A) 14(B) 15(C) 12

can someone please help me

Help somebody please!!Thank you

How does Emerson relate independence and friendships in Society and Solitude? 1. He indicates that friendships can make independence easier. 2. He considers tru

Choose the equation that is equivalent to the equation shown below. y = 2x + 4a/6b A. x = 2x - 3by B. c = ax-by/z C. b = 6y/2x+4a D. a = 3by-x/2

La familia de Graciela Look at the family tree and write how each person is related to Graciela. Follow the model. Then use your imagination to describe them, u