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First group - Alkali metals Group











The first group of the periodic table is divided into two groups: Group 1 A

includes elements with a single monovalent outer electron nell'orbitale type s.

Except for hydrogen (with special characteristics), the elements that compose it are alkali metals.

latter react violently with water, and develops considerable heat:
- Hydrogen (H Symbol, Z = 1) is the lightest and most abundant element in the universe, incolore, inodore ed è altamente infiammabile;
- Il litio (Simbolo Li, Z=3) è un metallo soffice di colore argenteo, altamente ossidabile;
- Il sodio (Simbolo Na, Z=11) è, come il litio, un metallo soffice e argenteo, ma è molto reattivo e brucia facilmente;
- Il potassio (Simbolo K, Z=19) è un metallo soffice bianco-argenteo, dalle caratteristiche chimiche simili al sodio;
- Il rubidio (Simbolo Rb, Z=37) , di colore bianco-argenteo, è debolmente radioattivo e spontaneamente infiammabile all’aria;
- Il cesio (Simbolo Cs, Z=55) è un metallo alcalino di colore argenteo-dorato, tenero e duttile, ed è uno dei tre metalli che si possono found in the liquid state at room temperature;
- Francium (Fr Symbol, Z = 87) is the heaviest of the alkali metals and unstable, and is the natural state in uranium and thorium.
Group 1 B includes in copper, silver and gold, which can have value greater than 1.
are called "transition metals" because they must be regarded as terms of the following passage from Group 8 Group 1:
- The copper (symbol Cu, Z = 29), reddish in color, has a high electrical and thermal conductivity, ductile, malleable, and is also highly resistant to corrosion;
- The silver (symbol Ag, Z = 47), white and gloss is the best conductor of heat and electricity between metals, occurs naturally in mineral form and pure;

- gold (symbol Au, Z = 79) is a transition metal soft, heavy, ductile, malleable and yellow. And 'only attack directed water and mercury, and is a state of nature in the form of flakes or nuggets.