Question

What is the other isotope of Boron that exist in nature (meaning its % abundance is not zero)? and what is its % abundance?

a
Boron-10, its abundance is around 20%
b
Boron-10, its abundance is around 40%
c
Boron-13, its abundance is around 60%
d
Boron-9, its abundance is around 80%
e
Boron-13, its abundance is around 20%
f
Boron-9, its abundance is around 40%

Answer 1

this is A

Answer 2

@jimthompson5910

Answer 3

Yes it's `Boron-10, its abundance is around 20%`
The other isotope Boron-11 has abundance around 80%

These are the only stable isotopes of Boron. The other isotopes are unstable with very short half-lives.

This page
https://periodictable.com/Isotopes/005.12/index.html
shows Boron-12 with a half-life of 20.2 ms and it decays into \(^{8}\text{Be}\) which is Beryllium-8 and it also decays into \(^{12}\text{C}\) which is Carbon-12. This is just one example of an unstable Boron isotope.

Answer 4

Which of these oxygen’s isotopes exist in nature (Their % abundance is not zero)? Select all the correct answers

a
oxygen-15
b
oxygen-16
c
oxygen-17
d
oxygen-18
e
oxygen-19

Answer 5

this is B C D

Answer 6

https://www.webelements.com/oxygen/isotopes.html
Oxygen-16 has natural abundance around 99.757%
Oxygen-17 has natural abundance around 0.038%
Oxygen-18 has natural abundance around 0.205%

We can see that Oxygen-16 is the most abundant isotope of the three here

Answer 7

Yes the three answers are B, C, D

Answer 8

ok thank you

Answer 9

No problem