What is the electron configuration of an element with atomic number 15? Which group of elements has the lowest ionization energy? The elements of which group are nonreactive? What is the neutral atom that has its first two energy levels filled, has 2 electrons in its th...
Noble gases (group 18) Which elements in the periodic table constitute the alkali metals? What family of elements in the periodic table contains the least metallic elements? a. halogens b. pnictogens c. chalcogens d. noble gases e. alk...
更新1: One last question... If the first element of group 1 pares to the last element of group 2... Which is more reactive? And which element of group 2 equals to the reactivity of any element in group 1? For example Ba = Na?? Just for an example..Your question is...
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The electronic configurations of elements A and B are given below: Since the outermost shell of element A is completely filled, it is stable and unreactive. The outermost shell of element B contains one electron only. Hence, it is more reactive.
The halogens are reactive chemical elements found in Group 17 of the Periodic Table. Listed by increasing size and mass, they are: fluorine, chlorine, bromine, iodine and astatine. Fluorine has 9 electrons, chlorine has 17, bromine has 35, iodine has 53 and astatine has 85. The larger the...
control group using the conventional technique, the research completed a 16-session treatment. At the end of the course, the post-tests for the AB, AA, and creativity for both groups were administered. The results of this research revealed that on three post-tests, the EG outperformed the ...
The nursing student cohort was randomly divided into two groups. In the experimental group, Group 1, two educational PowerPoints concerning the Stay S.A.F.E. initiative were distributed. The strategic implementation of safety practices related to medication. In a presentation format, Group 2 (the...
Which of the following elements is most reactive toward sodium? a. Te b. I c. Br d. Cl e. S Sodium: Sodium is a metallic element that is a member of the alkali metals (Group 1A). It is a very reactive element that readily tends to lose its single valence...
State the group to which each of the following elements belongs: 1. sodium 2. magnesium 3. chlorine 4. neon Periodic Table: The periodic table is a tabular arrangement of chemical elements organized by the atomic number from the lowest atomic number to th...