1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lady_Fox [76]
3 years ago
5

The half-life of a certain element is 100 days. How many half-lives will it be before only one-fourth of this element remains? 4

Chemistry
2 answers:
Georgia [21]3 years ago
7 0
The answer is 2 half lives, i checked
jolli1 [7]3 years ago
4 0

Answer;

2 half lives

Explanation;

-Half life is the time taken by a radioactive isotope to decay to half of the original amount.

-For example; if the original mass is 100% the time it takes to decay to 50% is the half life.

-Therefore, in our case; for the element to decay from 1 whole to a half of the element, is one half life, then decaying from a half to one-fourth of the element will be another half life, which means there are two half lives for an element to decay to one-fourth of the element.

You might be interested in
What is the preferable form of carbohydrate for eating?​
garik1379 [7]
Carbs build muscle and muscle is good
6 0
3 years ago
Which of the following observations is incorrect about the order of a reaction?
user100 [1]

Answer:

a) Order of a reaction is always a whole number

Explanation:

Order of a reaction is not always whole number. It can be zero, or fractional .

5 0
3 years ago
Chemistry is the definition​
KIM [24]

Answer:

the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.

Explanation:

Hope this helps. :)

8 0
3 years ago
Which statement justifies that phosphine (PH3) is a polar molecule?
lorasvet [3.4K]
The P-H bond is polar and the molecule is asymmetric.

Non-polar bonds cannot produce polar molecules and symmetric bonds result in even distribution of charge, so no net charge is observed.
4 0
3 years ago
Define metallic bonds
pochemuha
A metallic bond is a force that holds atoms together in a metallic substance.
6 0
3 years ago
Read 2 more answers
Other questions:
  • How many neutrons are in Cesium-130 (Cs)?<br><br> 55<br> 75<br> 130<br> 185
    14·1 answer
  • How do elements have such a different properties
    12·1 answer
  • For a science experiment what are some safety reasons for having a partner?
    14·1 answer
  • G determine the concentration of an hbr solution if a 45.00 ml aliquot of the solution yields 0.6485 g agbr when added to a solu
    15·1 answer
  • I HAVE TIME LIMIT I NEED CORRECT ANSWERS!
    7·1 answer
  • Consider the sulfur difluoridemolecule.What is the central atom? Enter its chemical symbol.How many lone pairs are around the ce
    9·1 answer
  • Which statement best describes a chemical property of Iron?
    6·2 answers
  • Written in this form, carbon-13, what does the 13 represent and what is the atomic number?
    15·1 answer
  • What do molecules put together form?
    12·1 answer
  • 00000044m<br> 300000km/s <br> Both in scientific notation
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!