diff options
Diffstat (limited to 'usr.bin/learn/lib/editor/L60.2c')
| -rw-r--r-- | usr.bin/learn/lib/editor/L60.2c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/usr.bin/learn/lib/editor/L60.2c b/usr.bin/learn/lib/editor/L60.2c new file mode 100644 index 00000000000..488a3b0f99e --- /dev/null +++ b/usr.bin/learn/lib/editor/L60.2c @@ -0,0 +1,57 @@ +#print +You can use an address on the 'r' command to read input at a particular +location in the file. Thus + 5r name +reads file "name" and appends its contents after line 5 o f the file. +You can use any kind of address, including a search. Here is a file "chem". +Find the line in file "chem" which contains the word "eight"; +read the file "more" and append it after that line. Then rewrite +"chem" and type "ready". +#create Ref + When elements combine to form compounds, the electrons in the +outermost shell of the atoms are the only ones that take part in the +reaction. These electrons are either transferred from the outer +shell of one atom to the outer shell of another, or, in some cases, +shared with the electrons in the outer shell of the second atom. + Whether the electrons are transfered to the second atom or shared, +this atom completes its quota of eight electrons in the outer shell. + An oxide is a compound containing oxygen and one other element. +The simplest of the oxides is H2O -- pure water, or hydrogen oxide. +Carbon dioxide is CO2 and is formed during the burning of organic +matter such as wood, paper, gasoline, or coal. In the same burning +process, H2O is formed and energy is released, generally as heat, +sometimes as light. Carbon dioxide is in the breath you just +exhaled. This gas is given off by decaying plant and animal matter. +Decay is a burning process. + Oxidation is a word that covers all the different ways things +burn. When something oxidizes, it is burning. + Compounds which are formed by the interchange of electrons are +called ionic compounds. The ions formed are said to possess +electrovalence. +#create chem + When elements combine to form compounds, the electrons in the +outermost shell of the atoms are the only ones that take part in the +reaction. These electrons are either transferred from the outer +shell of one atom to the outer shell of another, or, in some cases, +shared with the electrons in the outer shell of the second atom. + Whether the electrons are transfered to the second atom or shared, +this atom completes its quota of eight electrons in the outer shell. + Compounds which are formed by the interchange of electrons are +called ionic compounds. The ions formed are said to possess +electrovalence. +#create more + An oxide is a compound containing oxygen and one other element. +The simplest of the oxides is H2O -- pure water, or hydrogen oxide. +Carbon dioxide is CO2 and is formed during the burning of organic +matter such as wood, paper, gasoline, or coal. In the same burning +process, H2O is formed and energy is released, generally as heat, +sometimes as light. Carbon dioxide is in the breath you just +exhaled. This gas is given off by decaying plant and animal matter. +Decay is a burning process. + Oxidation is a word that covers all the different ways things +burn. When something oxidizes, it is burning. +#user +#cmp chem Ref +#log +#next +60.2d 5 |