5.1.2.1 the periodic table Flashcards
1
Q
When was the original periodic table arranged?
A
1869
2
Q
Who originally made the periodic table?
A
Mendeleev
3
Q
Why was Mendeleev described as ‘pure genius’?
A
He predicted new elements by leaving gaps in the periodic table for unknown elements
4
Q
The elements in the periodic table are arranged in order of _______ number and so that elements with similar properties are in ________, known as groups.
A
Atomic, columns
5
Q
The table is called a periodic table because?
A
Similar properties occur at regular intervals
6
Q
Elements in the same group in the periodic table have the same…
A
Number of electrons in their outer shell and this gives them similar chemical properties.
7
Q
A
