0
If a substance has. A half-life of 5 million years what fraction of the atoms remain after ten million years?
Wiki User
∙ 6y ago
A quarter remains.
Wiki User
∙ 6y ago
Add your answer:
Earn +20 pts
What fraction of uranium 235 is left after 1400 million years?
25 % uranium remain, 75 % is disintegrated.
Do properties remain the same regardless of the amount of the substance?
Intensive properties remain the same with a change in the amount of a substance - for example: temperature and density Extensive properties do not remain the same with a change in the amount of a substance - for example: mass and volume
DEFINITION OF SUBSTANCE?
Substance is any matter that exists around us. The properties of a substance remain same throughout.
Uranium-235 has a half life of?
The half-life is 700 million years !
For any pure substance the boiling point and melting point will always remain?
The melting point and the boiling point of a substance are physical characteristics for each substance and are unchanged at the same pressure.
After three half-lives what fraction of a radioactive sample will remain?
Approx 1/8 will remain.
Is the following sentence grammatically correct -'Energy of a substance which always remain stationary'?
It is not a sentence. There is no main verb.
What is the colour of turmeric indicator if the substance is neutral?
it will remain the same
Does water remain the same substance regardless of physical change?
Yes
What does not change when a physical change in a sample occurs?
Substance in the material Remain the same
What minerals do leaves leave behind when water evaporates?
A dried substance remain.
How much of one gram of radium-226 will remain unchanged after four half-lives?
After each half-life, half of the radium-226 will decay. Therefore, after four half-lives, 1/2^4 or 1/16th of the original gram of radium-226 will remain unchanged. This means that 1/16th of a gram, or 0.0625 grams, will still be unchanged after four half-lives.
