Considering the chemical properties, atomic weight of the element 'Be' was corrected based onA     Valency

The atomic weight of an element is not corrected based on its valency. The atomic weight of an element, such as Beryllium (Be), is determined by the average mass of the atoms of that element, taking into account the relative abundance of the different isotopes.

Here are the steps to calculate the atomic weight:

1. Identify the different isotopes of the element. Each isotope of an element has a different number of neutrons in the nucleus, which affects its mass.

2. Determine the mass of each isotope. This is usually given in atomic mass units (amu), where 1 amu is approximately equal to the mass of a single proton or neutron.

3. Determine the relative abundance of each isotope. This is usually given as a percentage or a decimal fraction.

4. Multiply the mass of each isotope by its relative abundance. This gives you the weighted mass for each isotope.

5. Add up the weighted masses of all the isotopes. This gives you the atomic weight of the element.

So, the atomic weight of an element is not corrected based on its valency but is determined by the weighted average mass of its isotopes.