Lithium has 2 stable isotopes Li-6 and Li-7. One of them has an abundance of 92.5% and the other has an abundance of 7.5%. Knowing the atomic mass of lithium is 6.941, which is the more abundant isotope?

Answer :  The more abundant isotope is, Li isotope-7

Explanation :

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

For Li isotope-7 :

Mass of Li isotope-7 = 7 amu

Fractional abundance of Li isotope-7 = 92.5 %

For Li isotope-6 :

Mass of Li isotope-6 = 6 amu

Fractional abundance of Li isotope-6 = 7.5 %

Average atomic mass of Li = 6.941 amu

As we know that the more abundant isotope is that whose percentage abundant will be more and atomic mass of isotope will be near to average atomic mass of isotope.

From this we conclude that, the percentage abundant of Li isotope-7 is more and their atomic mass is near to average atomic mass.

Hence, the more abundant isotope is, Li isotope-7

the correct name for the n3 ion is azide. azide is a polyatomic anion with a -1 charge and is written as n3 -1. it consists of three nitrogen atoms bonded together. hope i . let me know if you need anything else.

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .