Chemisrty Flashcards
Who suggested the idea of octaves?
John Newlands
Who suggested the idea of triads?
Johann Döbereiner
What was different about Mendeleev’s periodic table?
He left gaps for undiscovered elements.
How did scientists organise the periodic table before atomic number?
Atomic Mass.
What was the rule of triads?
Elements were organised in groups of three all with similar properties.
What is an isotope?
An atom with different numbers of neutrons than normal.
What is meant by the electronic structure of an atom?
The electronic structure of an atom describes the arrangement of its electrons around the nucleus.
How many electrons on the outer shell would there be in a group 3 element?
3
How were the atoms arranges in the idea of octaves?
Relative atomic mass.
How is the modern periodic table arranged?
Atomic number.
