Chemistry
>
GCSE
>
The Periodic Table
>
Why did Me...
3 years ago
·
1 Reply
·
9694 views
Mariano Metz
1 Answer
Head of Chemistry. Examiner. Very experienced online tutor.
2 reviews
At the time of producing his periodic table, not every element had been discovered. Mendeleev recognised that there must be missing elements based on the properties of the ones that had, so left gaps for undiscovered elements which were found later - scandium, gallium and germanium for example.
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Think you can help?
Get started with a free online introductions with an experienced and qualified online tutor on Sherpa.
Find a GCSE Chemistry Tutor