CHEM.7.A

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The student is expected to construct an argument to support how periodic trends such as electronegativity can predict bonding between elements;
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Knowledge and Skills Statement

Science concepts. The student knows how atoms form ionic, covalent, and metallic bonds.

the smallest particle of matter that has distinct physical and chemical properties; consists of a nucleus which contains protons and neutrons and an electron cloud which contains electrons

type of bond that results from the sharing of an electron pair between two atoms

 a chemical property that describes the ability of an atom in a molecule to attract shared-pair electrons towards itself

a pure substance that is made up of one type of atom

type of bond formed from the electrostatic attraction between oppositely charged ions in a chemical compound

a type of chemical bonding that is responsible for the characteristic properties of metals; arises from the electrostatic attractive forces between free electrons and positively charged metal ions

Research

Peng, Y. B., T Lei, H.T. Zhen, Z. X. Yuan, H. Xu, and F. Wen. "New Periodic Table of Elements: Electron Configuration and Motion, and Formation of Simple Sompound." Journal of Physics: Conference Series 1893, no. 1 (2021): 012205.
https://doi.org/10.1088/1742-6596/1893/1/012003

Summary:  This paper presents a new periodic table of elements while keeping the number of protons and electrons of the original element unchanged except that the electron period should not be configured in the form of 2, 8, 8 and 18 as that in the Mendeleev periodic table. Each layer/period of the new periodic table is filled with electrons according to the square of the number of periods, with 1, 4, 9, and 16 electrons in turn [34]. The new periodic table of elements is a new theoretical model, which can not only explain the phenomena of ammonia and water molecules, but also help to explain and predict other phenomena, such as the atomic spectrum except hydrogen atom, the properties of iron and copper elements, and the spectra and electron cloud phenomena of other atoms [12].