A Nuclear particle with the mass of an electron but opposite charge.
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- Gas of rotten eggs
If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.
- Why do copper products change color, and what is the name of the process?
Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.
- Diamonds Are Forever
Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?
- The most expensive metal in the world
Do you think the most expensive metal is gold? No! On earth there are more valuable metals. But we need to divide the value of metals that occur in nature, and metals - isotopes, which are obtained in special laboratories. Let’s look at natural metals first.
- Varieties of garnet minerals
The most famous type of garnet stone is pyrope (flaming). This is the "oldest of garnets", with a dense red color, similar to the grain of an edible garnet. Pyrope has a variety called rhodolite - a stone of dense pink or pink-purple color, which sometimes has the alexandrite effect and is used in...
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End Point
The point at which an indicator changes colour and a titration is stopped.
Heterogeneous Catalyst
A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.
Alpha Particles
A helium nucleus.
Molar Solubility
Number of moles of a solute that dissolve to produce a litre of saturated solution.
Spectral Line
Any of a number of lines corresponding to definite wavelengths of an atomic emission or absorption spectrum, represents the energy difference between two energy levels.
Basic Anhydride
The oxide of a metal that reacts with water to form a base.
Chemistry is a familiar school subject
Everyone liked to observe the reaction of reagents. But few know interesting facts about chemistry, which we will discuss in this article.
Bond Order
Half the numbers of electrons in bonding orbitals minus half the number of electrons in antibonding orbitals. Bond order gives an indication to the stability of a bond. Also defined as the difference between the number of bonding electrons and antibonding electrons divided by two.
Band Theory of Metals
Theory that accounts for the bonding and properties of metallic solids.
Ternary Acid
A ternary compound containing H, O, and another element, often a nonmetal.
