Electron shells

Description

GCSE Science (Chemistry) Flashcards on Electron shells, created by eibhlinjones200 on 30/05/2013.
eibhlinjones200
Flashcards by eibhlinjones200, updated more than 1 year ago
eibhlinjones200
Created by eibhlinjones200 almost 11 years ago
113
1

Resource summary

Question Answer
Electron shell rules 1) electrons always occupy shells (sometimes called energy levels) 2) the lowest energy levels are always filled first 3) only a certain number of electrons are allowed in each shell (2 electrons in the 1st shell, 8 in the 2nd and 8 in the 3rd)
Electron configurations
Electronic configuration You can use the electronic configuration to work out the period, group and atomic number of an element: the period of the element is the same as the number of shells which contain electrons, the group number can be found by looking at how many electrons occupy the outer shell of the element (e.g) sodium has the elecronic configuration 2,8,1. The period number is 3 as there are 3 shells occupied. The group number is one as there is one electron in the outer shell. the atomic number is found by adding up all the electrons. You can use it to identify elements
Show full summary Hide full summary

Similar

Acids and Bases
silviaod119
Elements, Compounds and Mixtures
silviaod119
Alcohols
Bee Brittain
Classification Matter Quiz
Selam H
Atomic Structure
Jenni
Chemistry Functional Groups Quiz
09valentinerhi
Solutions
Andrea Smith
Chem 1006 Key Terms
Andrea Smith
Block 7 Alkenes and aromatics
vicstevens
Block 8 Materials Chemistry 1
vicstevens
Testing for ions
Joshua Rees