Test your knowledge about Valence electrons And Group VIIA

The correct answer is Cl. Cl is the chemical symbol for chlorine. Chemical symbols are used to represent elements in the periodic table. In this case, Cl represents the element chlorine, which is a greenish-yellow gas with a strong odor. Chlorine is commonly used in disinfectants, bleach, and as a component in PVC pipes.

All of these elements (Fluorine, Iodine, and Astatine) have seven valence electrons. Valence electrons are the electrons in the outermost energy level of an atom, and they determine the atom's chemical properties. In the case of these elements, they all belong to Group 17 (Group VIIA) of the periodic table, also known as the halogens. Halogens have seven valence electrons, which allows them to easily gain one electron and achieve a stable octet configuration. Therefore, all of these elements have seven valence electrons.

The correct answer is "Seven valence electrons in their highest-energy orbitals." The Group 7A elements, also known as the halogens, have seven valence electrons in their outermost energy level. These electrons are located in the highest-energy orbitals, which are the outermost orbitals of the atom. This arrangement of valence electrons gives the Group 7A elements their characteristic chemical properties, such as high reactivity and a tendency to gain one electron to achieve a stable octet configuration.

The symbol of Fluorine is F.

The VIIA group in the periodic table consists of the halogens, which include elements like fluorine, chlorine, and iodine. These elements have seven valence electrons, which means they have seven electrons in their outermost energy level. This allows them to readily gain one electron to achieve a stable octet configuration, making them highly reactive and likely to form compounds with other elements. Therefore, the correct answer is seven.

Potassium is not a part of Group 7A. Group 7A, also known as Group 17 or the halogens, consists of elements chlorine, iodine, and astatine. Potassium belongs to Group 1A, also known as Group 1 or the alkali metals.

Group 7A of the periodic table consists of elements known as halogens. Halogens are a group of highly reactive nonmetals that include elements such as fluorine, chlorine, bromine, iodine, and astatine. They are known for their ability to form salts and compounds with other elements, and they are also characterized by their tendency to gain electrons in chemical reactions. Therefore, the correct answer is "Halogens."

The correct answer is 2, 8, 7. This answer represents the electronic configuration of chlorine. The first number, 2, represents the number of electrons in the first energy level, the second number, 8, represents the number of electrons in the second energy level, and the third number, 7, represents the number of electrons in the third energy level. Therefore, the answer 2, 8, 7 correctly defines the number of electrons in chlorine.

Halogens, such as fluorine, chlorine, bromine, and iodine, have seven valence electrons in their outermost energy level. This makes them highly reactive because they only need one more electron to achieve a stable octet configuration. They have a strong tendency to gain an electron from other elements, which makes them very reactive. Therefore, the statement "They are very much reactive" accurately describes the reactivity of halogens.

Iodine has an atomic number of 53 because the atomic number represents the number of protons in the nucleus of an atom. Since iodine has 53 protons, its atomic number is 53.