Periodic Table Flashcards
1
Q
Periodic table arrangement
A
Elements are arranged in increasing atomic numbers.
2
Q
Who created the 1st periodic table
A
Dmitri Mendeleev
3
Q
Why did he leave gaps
A
He had not yet discovered all elements.
4
Q
Group 0 elements
A
Noble gases
5
Q
Group 1 elements
A
Alkali metals
6
Q
Group 7 elements
A
Halogens
7
Q
Displacement reaction
A
When a more reactive metal can remove a less reactive metal from a compound.
8
Q
Why are noble gases inert
A
They have full outer shells so they don’t need to lose or gain electrons
