which element in period 2 has the highest mass
A. Na B. Si C. Cl D. Ar 20. Sulfur: Value given for monoclinic, beta form. For potassium, which is located in period 4, the second ionization energy will remove an electron from the third energy level. Berkelium: Value given for alpha form. They have low electron affinity. Period 5 elements have an inner electron configuration of [Xe] 6. click on any element's name for further information on chemical properties, environmental data or health effects.. Chemical elements listed by atomic mass The elemenents of the periodic table sorted by atomic mass. For rubidium, which is located in period 5, the second ionization energy will remove an electron from the fourth energy level. View Answer. Group 2 elements are called alkaline metals because they form alkaline solutions, hydroxides, when reacting with water and their oxides are found in the earthâs crust. This is because the increase in electrons is paralleled by an increase in shells. The atomic mass is useful in chemistry when it is paired with the mole concept: the atomic mass of an element, measured in amu, is the same as the mass in grams of one mole of an element. Selenium: Value given for hexagonal, gray form. 5. 1. Relative atomic mass of a light element up to calcium is approximately.....its atomic number. A.) Answer. B. The second ionization energy will have to remove an electron located on a lower energy level. Notes on the Melting Point of particular elements: Helium: Helium does not solidify at standard pressure. C. oxidation number D. mass number 19. This table shows the pattern in the periodic table that Mendeleev developed and how the missing elements at that time could be predicted. Watch. Which element in Period 3 has the greatest tendency to gain electrons? Page 1 of 1. Another trend is the increase in the radius of elements as we move down a column, while the number of valence electrons remains the same, even though the atomic number keeps increasing. Nitrogen has a larger atomic radius than oxygen. Ask your questions now >> Applying to uni? False; 3.) ALKALINE METALS. Announcements Join Uni of Surrey for a live Q and A on personal statements, 5pm on Thursday! Add the mass of protons and neutrons to compute the atomic mass of a single atom of an element. True; B.) The valence electrons of groups 5A elements are in the 6s subshell. 2. Trend 2. Its valence shell contains 2 electrons; They have low electronegativity Which has more metallic character, Lead (Pb) or Tin (Sn)? This list contains the 118 elements of chemistry. Find your group chat here >> start new discussion reply. From the periodic table you can see that carbon has an atomic number of 6, which is its proton number. Group 8A elements have completely full outer principal shells. C. Period 2 , group 18. D. Period 2 , group 1. Period 3 , group 17. The highest principal quantum number of period 2 element is 2. Classify each statement as true or false: 1. Fluorine (F) Nitrogen (N) Helium (He) 2.) 4. Electrons orbit the atom's nucleus in energy levels. Based on the periodic trends for ionization energy, which element has the highest ionization energy? Phosphorus: Value given for yellow phosphorus form. Period 2 , group 17. Thus, since the atomic mass of iron is 55.847 amu, one mole of iron atoms would weigh 55.847 grams. Example: Find the atomic mass of a carbon isotope which has 7 neutrons. View Answer. View Answer. 4.) As the elements of Period 2 are considered in succession from left to right, there is a general decrease in A. ionization energy B. electronegativity C. metallic character D. nonmetallic character 21. Carbon: Value given for diamond form. Group 1 metals are less reactive than group 2 metals. Navigate by clicking the element on the table above or using the table below. Boron is an element that is in period 2 on the periodic table and has an atomic mass of 10.81 Element in period 2 with the highest ionisation energy? Period 4 elements have an inner electron configuration of [Ar] 3.