Question

Which numerical setup can be used to determine the atomic mass of lithium

Answer 1

To determine the atomic mass of lithium, consider the isotopic composition and calculate the weighted average of the masses of its isotopes.

Step-by-step explanation:

In order to determine the atomic mass of lithium, you need to consider the isotopic composition of lithium. Lithium has two main isotopes: lithium-7, which makes up 92.4% of naturally occurring lithium, and lithium-6, which makes up 7.60% of naturally occurring lithium.

You can calculate the atomic mass of lithium by multiplying the mass of each isotope by its abundance and then summing them up. For example:

Atomic mass = (0.924 × 7.016 u) + (0.076 × 6.015 u)

After doing the calculations, you'll find that the atomic mass of lithium is approximately 6.94 unified atomic mass units (u).

Answer 2

Atomic mass of lithium is 7

Step-by-step explanation:

Atomic mass is the mass of an atom and it is determined by the nucleus of an atom because the mass of electrons are very negligible.

Numerically, the mass of an atom = atomic number + number of neutrons

Atomic number is the total number of protons present in the nucleus of an atom.

Hence, atomic mass of lithium is

3 + 4 = 7

where 3 is the atomic number of lithium and 4 is the number of neutrons in lithium