Answer:
5 neutrons
Explanation:
There five isotopes of lithium. The most stable and abundant is lithium-7.
Its percentage is 92.5%. It has four neutrons. All lithium isotopes have same atomic number but different atomic mass because of different number of neutrons.
Lithium-8 have five neutrons.
Lithium-9 have six neutrons.
Lithium-11 have eight neutrons.
Lithium-4 has one neutron.
Lithium is alkali metal.
It is present in 1st group.
Its atomic number is 3.
Its atomic mass is 7 amu.
Lithium salts are used in psychiatric medicine.
Answer:
The correct answer is - 9935 years approximately.
Explanation:
Let z be the age in years to be found:
(15300 disintegrations) x (1.0 g / 0.250 g) / (1.84×10^4 disintegrations)
= 3.3260
half life of carbon = (1/2)^(z/5730 yr)
Solve for z
3.3260 = (1/2)^(z/5730)
Take the log of both sides:
log 3.3260 = (z/5730) log (1/2)
log 3.3260 / log (1/2) = z/5730
z = 5730 log 3.3260 / log (1/2)
= 1.73378816*5730
= 9935 years approximately.
Answer:
volume
Explanation:
things expand when heat is applied taking up more space hence volume
Answer:
D po ayan po ang sagot ko salamat po
This is given by Avogagro number: 1 mol = 6.02*10^23 particles
Then you can do whichever to these two relations, because they are equivalent:
- 1mol / 6.02*10^23 representative particles, and
- 6.02*10^23 representative particle /1 mol
Only the second option of the question includes one of the valid conversion factors. Then, the conversion factor of the second option is the right answer
