P1P2C4 - Periodic table Flashcards
1
Q
What is period?
A
The rows on the periodic table.
How many shells an element has.
2
Q
What is a group?
A
The columns on the periodic table?
How many electrons in the outer shell.
3
Q
What is the atomic number?
A
The number of protons in an atoms nucleus.
4
Q
Who is John Newland?
A
The first person to devise a periodic table.
5
Q
What was John Newlands periodic table?
A
- Ordered by the weight of the element.
- However, the table was incomplete, and some elements were placed in inappropriate groups.
6
Q
What was Dmitri Mendeleev’s periodic table?
A
- He added gaps to Newlands’ table for undiscovered elements.
7
Q
What discovery proved Mendeleev’s periodic table to be correct and Newlands’ to be wrong?
A
Protons and isotopes
8
Q
Where are metals found?
A
Left side
9
Q
Where are non metals found?
A
Right side
10
Q
What are the properties of metals?
A
- High melting and boiling points.
- Conductors of heat and electricity.
- All solids (except for mercury) at room temperature.
