By what formula we can calculate the average of atomic masses of 2 elements (what is the average of Li and k? )
Answers
Answer:
The atomic number of an element defines the element’s identity and signifies the number of protons in the nucleus of one atom. For example, the element hydrogen (the lightest element) will always have one proton in its nucleus. The element helium will always have two protons in its nucleus.
Key Points
An element can have differing numbers of neutrons in its nucleus, but it always has the same number of protons. The versions of an element with different neutrons have different masses and are called isotopes.
The average atomic mass for an element is calculated by summing the masses of the element’s isotopes, each multiplied by its natural abundance on Earth.
When doing any mass calculations involving elements or compounds, always use average atomic mass, which can be found on the periodic table.
Explanation:
Answer:
total abundance=100
average atomic mass=mass of 1st isotope×abundance+ mass of 2nd isotope× abundance/100