ok this is for whoever just answered my question about the periodic table????

Question

ok i get what u r saying but can u explain what the book is saying: The periodic table can be divided into 2 sections. one section consists of the first to groups, Groups 1 and 2, plus the elements in Groups 13-18. these 8 groups are called the representaive elements. the elements in Groups 3-12 are called transtion elements.

Answer 1

The groups are the vertical columns in the periodic table. The first two groups and groups 13-18 are considered part of one grouping because going left to right (groups 1, 2, 13, 14, 15, 16, 17, 18) represent filling of the eight valence electrons, or bonding electrons, of and atom. Elements in these groups are generally the only ones to form covalent bonds with other elements. The transition elements, meanwhile, represent filling of the d orbital, which does not lend itself to covalent bonds. However, the transition elements comprise the majority of the important metals, which tend to form ionic bonds and have a variety of properties.

Answer 2

I'm not that person but I am a chemistry teacher. So when you are looking at the periodic talbe the first two columns are groups 1 and 2 then the middle colums the shorter ones are groups 3-12, then the last 6 columns are groups 13-18. The middle groups are called transitions elements (groups 3-12) then the other groups are called the representative elements.

Answer 3

Its all approximately Valences and balancing factors to make impartial compounds wide-spread Sodium in answer has a valence of +a million So do something of the Alkali earth metals Lithium, Sodium, Potassium, Rubidium, Cesium, Francium Then all the Halogens even have -a million valences Fluorine, Chlorine, Bromine, Iodine, and Astatine you will see the valences from some precise periodic tables. SO whilst u write the formula for them and cause them to impartial compounds you decide directly to stability the form of factors and the valences. NaBr Na is +a million and Bromine is -a million so in trouble-free terms a million of each is needed +a million + -a million = 0 meaning impartial CaCl2 Calcium has a +2 valence and Chlorine a -a million valence So subsequently 2 Chlorines provides u a -2 + +2 from the Calcium = 0 yet another impartial

Answer 4

The elements in these groups have similar properties. For example, helium, neon and argon have similar properties (namely, they are the least reactive of all elements. Carbon, silicon, and germanium have similar properties (germanium can is used sometimes as a semiconductor like silicon is).