Old periodic table, paper 1&2 Flashcards Preview

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Flashcards in Old periodic table, paper 1&2 Deck (9)
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1

An element is:

A substance or molecule that only contains one type of atom.

2

Mendeleeves periodic table.

- 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

How many electrons on an atoms first shell

2

4

How many electrons on there next shells:

8,8,8,8,8,8,8

5

Group 8 or 0 are called the:

Noble gasses.

6

The group an element is in =

How many electrons are in the atom outer shell.

7

The row the element is in =

How many electron shells there are on the atom.

8

Properties of noble gasses:

- they are unreactive
- have a full electron shell

9

What is a ion?

An ion is a charged atom which has lost or gained an electron.