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Chemistry - have fun

Horizontales
The atomic particles which have no charge are called
The densest of all elements
The transuranium element that is the most abundant
The most abundant element at the earth's surface
The number of protons in an atom
The positively charged particles in the nucleus of an atom
The simplest kind of atom with only a single electron whirling around a single proton
The element group that is highly reactive, showing a special tendency to form compounds with alkali and alkaline earth metals
The only metal that is liquid at room temperature
Verticales
The semimetal that is used to make computer chips
The elements in the last column of the periodic table that do not normally combine with anything else
The colorless, odorless gas that makes up about 78% of the earth's atmosphere.
A substance that is made up of only one type of atom
The tiny particles that matter is composed of.
A substance that is made up of more then one type of atom
The basic building block of all complex compounds found in all living organisms
The most widely used halogen
The most common alkaline metal
The densest of the everyday metals