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Writing chemical formulae
The formulae of covalent compounds
To work out the formulae of covalent compounds, we need to use the valency of the atoms in the compound. This is because the valency tells us how many bonds each atom can form. This in turn can...
added 1 day 12 hours ago by amanda.bragg
The Dangers of Radiation
Natural radiation comes from a variety of sources such as the rocks, sun and from space. However, when we are exposed to large amounts of radiation, this can cause damage to cells. γradiation is particularly dangerous because it...
added 1 day 12 hours ago by amanda.bragg
The 'half-life' of an element
DEFINITION 1: Half-life
The half-life of an element is the time it takes for half the atoms of a radioisotope to decay into other atoms.
Table 1 gives some examples of the half-lives of different elements.
So, in the...
added 1 day 12 hours ago by amanda.bragg
Popular Lessons
Prerequisite Experience:
Students should be able to conduct research online and use a word processor. Prior PowerPoint or other presentation software tool experience would be helpful.
Time Management Tips:
Limit the number of slides students create...
added 1 month 3 weeks ago by Yaping
What You Will Learn
In this lesson you will learn the following skills:
Interpret given circle graphs
Use circle graphs to make predictions
Use data from a circle graph to make a bar graph
Select among frequency tables, line plots, bar graphs and line...
added 2 months 6 days ago by jmdavidson01
Functions of the form y=ax+q
Functions with a general form of y=ax+q are called straight line functions. In the equation, y=ax+q, a and q are constants and have different effects on the graph of the function. The general shape of the graph of functions...
added 1 month 1 week ago by amanda.bragg