How does periodicity relate to electron arrangement?
The commonly used long form of the periodic table is designed to emphasize electron configurations. For representative elements the number of valence electrons is the same as the periodic group number, and the number needed to match the next noble-gas configuration is 8 minus the group number.
What is atomic structure and periodicity?
B: Atomic Structure and Periodicity. The properties of atoms arise from the interactions between their nuclei and electrons. Atoms are composed of: A positively charged nucleus, composed of positively charged protons and neutral neutrons. Negatively charged electrons that orbit around the nucleus.
What is the connection between atomic structure and chemical reactions?
Explanation: It is the structure of the electron configurations that drive chemical reactions. The electrons will freely to move between atoms in order to achieve stability. The movement and rearrangement of electrons are what causes chemical reactions.
What are the electronic structures of atoms?
Electrons in an atom are grouped around the nucleus into shells. Shell (electron): A grouping of electrons in an atom according to energy. The farther a shell is from the nucleus, the larger it is, the more electrons it can hold, and the higher the energies of those electrons.
What is the relation of electronic structure of an atom with its position in the modern periodic table?
Answer: The position of an atom/element in the periodic table is related to the number of electrons in the outermost shell. In a given column or group, all elements have the same number of electrons in their outermost shells. For example, in group 2, all elements have two electrons in their outermost shell.
What is electronic configuration in periodic table?
The electron configuration of an element describes how electrons are distributed in its atomic orbitals. Electron configurations of atoms follow a standard notation in which all electron-containing atomic subshells (with the number of electrons they hold written in superscript) are placed in a sequence.
How does the electron structure of atoms change when they form chemical bonds?
How does the electron structure of atoms change when they form chemical bonds? Their outer electron orbits fill up. 14. Describe the difference between a covalent bond and an ionic bond between two atoms.
What is bonding and structure in chemistry?
A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.
Why do chemical properties depend on electronic configuration?
Explanation: When we write the electronic configuration of an atom then we get to know the number of electrons present in the outermost shell of an atom. This further tells about the reactivity of the atom.
How does the electronic configuration of an element explain its chemical reactivity?
The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms. This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
What is the electronic structure and periodic table?
Electronic Structure and the Periodic Table. Electronic Structure and the Periodic Table – In chemistry, a valence electron is an electron that is associated with an atom, and that can participate in the formation of a chemical bond; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Why do elements on the right side of the periodic table?
As a result, the elements on the left side of the periodic table generally lose electrons when forming bonds. Conversely, elements on the right side of the periodic table are more energy-efficient in gaining electrons to create a complete valence shell of 8 electrons.
What are representative elements in periodic table?
This section focuses on the periodicity of the representative elements. These are the elements where the electrons are entering the s and p orbitals. The representative elements occur in groups 1, 2, and 12–18. These elements are representative metals, metalloids, and nonmetals.
How does the presence of valence electrons affect chemical properties?
The presence of valence electrons can determine the element’s chemical properties and whether it may bond with other elements: For a main group element, a valence electron can only be in the outermost electron shell. In a transition metal, a valence electron can also be in an inner shell.