When you look up the atomic masses of Si and Sn and then find the average and then look up the atomic mass of Ge, what is discovered? does it lend supporting evidence to the periodicity of elements?
Why not look up Si and Sn, take the average and compare with that of Ge? You don't need an outsider to do that for you.
yes but how is it compared
Well, let's see.
Si = 28.08
Sn = 118.71
So the average is (28.08 + 118.71)/2 = 73.4. Do you think that is anywhere near the atomic mass of Ge (at 72.6)? It looks to me that it is. Try that for some other "triads." For example, look at the Li, Na, K triad.
Li = 6.9
K = 39.1
Average is (6.9 + 39.1)/2 = 23
How do you think that compares with 22.99 for Na? Do you think it is close?
The whole idea here is that in a group of 3 elements that the middle element in the column is very close to the average of the atomic masses of the first and last.
To get the average atomic mass of Silicon (Si) and Tin (Sn), you need to gather their atomic masses from a reliable source. The atomic mass of Si is approximately 28.086 amu (atomic mass units), while the atomic mass of Sn is around 118.71 amu.
To find the average atomic mass of these elements, you can use the formula:
Average Atomic Mass = (Mass of Si + Mass of Sn) / 2
Plugging in the values:
Average Atomic Mass = (28.086 amu + 118.71 amu) / 2
Average Atomic Mass ≈ 73.398 amu
Now let's consider the atomic mass of Germanium (Ge). The atomic mass of Ge is about 72.63 amu.
Comparing the average atomic mass of Si and Sn (73.398 amu) with the atomic mass of Ge (72.63 amu), we can observe that the values are quite similar, with only a small difference.
This similarity in atomic masses among neighboring elements (Si, Sn, and Ge) supports the concept of periodicity in the Periodic Table of Elements. Periodicity refers to the recurring patterns and trends observed among elements when arranged in order of their atomic numbers.
In this case, Si, Sn, and Ge are located close to each other in the periodic table, sharing similar properties and having similar atomic masses. This trend supports the idea that elements with similar atomic structures and properties tend to exhibit periodicity in their physical and chemical properties.