Physics Of The Mass Atomic Mass

964 Words4 Pages
An atom contains protons, neutrons and electrons; the protons and neutrons are I the nucleus of the atoms and the electrons are in the outer shells of the atoms. There are different charges of protons, neutron’s and electron’s: protons have a positive charge however, neutron have no charges and electrons have a negative charge. The electron shells contain electrons a 8 electrons can make a full outer shell however, the first shell has to always be 2 electrons in it In addition the periodic table is table that represents elements as symbols e.g. (He) represents helium, each symbol have a number above the symbols and one at the bottom of the symbols The number at the top represents the relative atomic mass (protons plus neutrons) there is…show more content…
As you go down the column an atomic orbital adds on. Similarities can be elements in group 1 have all got low melting point and they are all soft and weak alkali metals. Each group number represents the number of electrons in the outermost shell in every element in the group. Blocks Blocks that separate elements (S, P, D and F block), the s block contains the elements which are on the left side, the elements consist of alkali metals and alkaline earth elements. In addition is d block contains the transition metals which are in the middle of the periodic table correspondingly, the p block contains the noble gases such hydrogen the p block also contains halogens and metalloid’s these are on the right side of the periodic table. The F block contains radioactive elements. Trends in chemical and physical properties in the groups and periods they belong to I am going to explain the trends of chemical and physical properties by giving examples from group 1 and 7 elements, group 1 elements have similar properties as they are alkali metals and as you go down the group the elements get more reactive e.g. lithium is more harder and less reactive than the element at the bottom of the group which is the most reactive and very soft, also the melting points and The alkali metals generally become more dense going down the group and they become softer, but the trend is not perfect because potassium is less dense than sodium. All of the outer most shells in group 1
Open Document