The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). [1 ] The elements have very similar properties: they…
These developments are ever growing in relevance to minimize the impacts caused by cement use, notorious for being one of the largest producers (at about 5 to 10%) of global greenhouse gas emissions. [61 ] The use of alternative materials…
Copper is a chemical element; it has symbol Cu (from Latin cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.
It comprises 24 member states. [4 ] Israel, admitted in 2013, is the only full member geographically out of Europe. [5 ] [6 ] CERN is an official United Nations General Assembly observer. [7 ]
Sebevražda je často páchána ze zoufalství, jehož příčina je obvykle přičítána duševní poruše, například depresi, bipolární poruše, schizofrenii, alkoholismu nebo narkomanii. [1 ] Svou roli nezřídka hrají i stresové faktory, jako například…