good question ... I've never heard them called that
the 2nd group of elements on the periodic table
Family. Apex
The halogens can be found in Group 17 (Group VIIA) on the periodic table. They include elements such as fluorine, chlorine, bromine, iodine, and astatine. These elements have similar chemical properties due to their outer electron configuration.
The halogens are a group of elements in the periodic table that includes fluorine, chlorine, bromine, iodine, and astatine. They are highly reactive nonmetals that readily form compounds with other elements.
The second group in the periodic table is called the alkaline earth metals. These elements include beryllium, magnesium, calcium, strontium, barium, and radium. They share similar chemical properties such as reactivity and the ability to form ionic compounds with other elements.
Apart from Hydrogen, Helium and Beryllium; non metals are located in the p-block. Starting from the third period with addition of Li, all of s-block elements are metals. The d-block elements are a compete set of metals.
Li, Na, K etc., 1st group elements Ca, Ba etc., 2nd group elements, give the strongest bases
The elements in group 18 are extremely reactive and re reffered to as the noble gases********************2nd Opinion ******************The elements in group 18 are extremelyun-reactive.
The valence electrons are found on the valence shell, the outermost shell of an atom. By using the periodic table and the group numbers, one can find the number of valence electrons for elements in groups (vertical columns) 1-2 and 13-18. For the 1st 2 groups (1 and 2), the group number tells the number of valence electrons for elements which belong in that group Elements in the 1st group have 1 valence electron and elements in the 2nd group have 2 valence electrons. For groups 13-18, refer to the tens' value (the teen value that is not the "1" in these cases). Elements in group 13 have 3 valence electrons, elements in group 14 have 4 and so on to the the final group, 18, where electrons have a full octet of valence electrons.
The alkali and alkaline earth metals are the least electro negative elements, and the halogens are the most electro negative elements.
Valence electrons are in the outer shell of the atom. The first column (group 1)has a +1 valence, which means that it has an extra electron it can 'lose' when bonding with other atoms. The 2nd column (group 2) has +2. The same goes for groups 3. Group 4 can gain 4 and lose 4. Group 5 can 'gain' 3 electrons, group 6 can gain 2 electrons etc.
An element should release two of its outermost electrons to obtain +2 ion. The elements in group 2A are the most likely elements to have this configuration. These are known as Alkali Earth Metals.The elements in the 2nd group have 2 valence electrons. Elements give away their valence electrons to get stable electron configuration. The elements in the 2nd group such as beryllium, magnesium, calcium, strontium, barium likely to have positive ion with charge of 2.Group II elements (the alkaline earth metals). This is because this particular group of elements have two extra electrons in their electronic configurations. They need to lose these two electrons to attain the stable noble gas configuration. So they will have a tendency to lose them to other atoms or group of atoms, in the process incurring a double positive charge (since there will now be two less electrons than protons). So Be, Mg and Ca will all form positive ions (cations) with a charge of +2. They are represented by Be2+, Mg2+ and Ca2+ respectively. But, other elements like copper and barium will also form cations of charge +2.