Which of the following pairs of elements could possibly be found in the same group on the periodic table?
a) A forms a 2+ ion; B is an alkaline earth metal.
b) A is a noble gas; B forms a 1- ion.
c) A has 3 valence electrons; B is a halogen.
d) A forms a 2- ion; B has the atomic number 12.
The periodic table is a useful tool to group and describe the properties of elements. It is arranged in terms of increasing atomic number or number of protons. In addition, we the blocks of the periodic table correspond to the orbitals that the valence electrons occupy. We can separate the periodic table into an s, p, d, and f block. Periodic trends between chemical species can also be predicted by using the periodic table.
Answer and Explanation: 1
The elements in choice a) A forms a 2+ ion; B is an alkaline earth metal are found in the same group of the periodic table.
An alkaline earth metal...
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fromChapter 3 / Lesson 1
Learn about the organization of the periodic table into groups and periods and how these differ. Also learn the history of the periodic table and its properties.