

The shows you the isotopes of the elements.
There are different kinds of isotopes, some are stable, some are not. The unstable isotopes can decay as alpha-rays are two different beta-rays. These differences are encoded by using different colors.

Kalzium can display the isotopes of a range of elements
The R/S Phrases, also known as Risk and Safety Statements, R/S statements, R/S numbers, and R/S sentences, is a system of hazard codes and phrases for labeling dangerous chemicals and compounds. The R/S phrase of a compound consists of a risk part (R) and a safety part (S), each followed by a combination of numbers. Each number corresponds to a phrase. The phrase corresponding to the letter/number combination has the same meaning in different languages.
The Glossary gives you definitions of the most used tools in chemistry as well as some knowledge data. On the left side of the windows you can see the tree of items. On top, there are chemical terms, below that there is a second tree of laboratory-tools.
On the top of the widget you can see a searchbar. If you type in the bar the trees will be adjusted immediately. The small button in the right end of the searchbar will clear it.

The dialog allows you to plot some information about elements. The X-axis represents a range of elements (from one number to a higher number). You set this range using the First Element and Last Element fields on the dialog.

Kalzium can plot some data about a range of elements.
The enables the user to solve chemical equations. This is an example:
aH2O + bCO2 -> cH2CO3
The computed equation will be displayed on the right side of the window. As you can see in the first example you can also define the value of one or more coefficients. The other coefficients will be adjusted. Furthermore, it is possible to use brackets around elements or electronic charges as shown in the last two examples.

Kalzium can solve chemical equations

The Overview tab is the first one and it shows you an overview of the element the mouse is over.
The State of Matter tab is the second in the navigation panel.
You are first presented with the following icons and text:

Kalzium can show you which elements are solid/liquid/vaporous at a given temperature.
The Timeline feature allows you to explore the elements of the set time period. This is great for getting a feel for how the PSE evolved over time, as more and more elements were discovered. If you move the slider you will notice that some elements disappear if you move it to the left and reappear if you move it to the right. Furthermore the number will change constantly.
The number represents the date you are looking at. If you move the slider to e.g. 1856 you will only see the elements which where known in the year 1856.
You will notice that some elements are not even shown in the current year. This is because some of the elements have not been discovered yet but are predicted to exist.

The PSE back in time (elements known in 1856)
The Calculate tab is the last in the sidebar. It allows you to calculate molecules weights.
You are first presented with the following icons and text:

Calculate
The action allows you to display the legend for the scheme you are in (Groups, Family, Blocks). The legend is displayed by default but if you hide it, it will stay hidden until you choose to show it. Kalzium will keep this setting in its configuration file, so that the next time you run it, the setting will be as you left it.