Old periodic table, paper 1&2 Flashcards
1
Q
An element is:
A
A substance or molecule that only contains one type of atom.
2
Q
Mendeleeves periodic table.
A
- arranged by atomic number
- put elements in groups by there chemical and physical properties.
- some gaps in table for yet to be discovered elements.
- he predicted there properties and atomic number
3
Q
How many electrons on an atoms first shell
A
2
4
Q
How many electrons on there next shells:
A
8,8,8,8,8,8,8
5
Q
Group 8 or 0 are called the:
A
Noble gasses.
6
Q
The group an element is in =
A
How many electrons are in the atom outer shell.
7
Q
The row the element is in =
A
How many electron shells there are on the atom.
8
Q
Properties of noble gasses:
A
- they are unreactive
- have a full electron shell
9
Q
What is a ion?
A
An ion is a charged atom which has lost or gained an electron.
