1.15 Explain that Mendeleev thought he had arranged elements in order of increasing relative atomic mass Flashcards
1
Q
What did Mendeleev believe about the arrangement of elements?
A
Mendeleev thought he had arranged elements in order of increasing relative atomic mass.
2
Q
Why was Mendeleev’s arrangement not always correct?
A
It was not always true due to the relative abundance of isotopes of some pairs of elements.
3
Q
How do isotopes affect the order based on atomic weights?
A
Knowledge of isotopes explains why the order based on atomic weights was not always correct.
4
Q
What can affect the mass of an element when considering isotopes?
A
Some elements have a higher mass when isotopes are considered, but a lower mass when looking at a specific isotope.
