Malmalekebrig
contestada

There are six elements in Group 14 on the Periodic Table. One of these elements has the symbol Uuq, which is a temporary, systematic symbol. This element is now known as flerovium.

66 Identify an element in Group 14 that is classified as a metalloid. [1]
67 Explain, in terms of electron shells, why each successive element in Group 14 has a larger atomic radius, as the elements are considered in order of increasing atomic number. [1]
68 State the expected number of valence electrons in an atom of the element flerovium in the ground state. [1]

Respuesta :

Silicon and germanium are metalloids. Atomic radius increases because there are more electron shells. Four valence electrons.

66) An element in group 14 that can be classified as a Metalloid is; Silicon and Germanium.

67) The reason why atomic radius increases with successive elements in group 14 is because; the number of energy levels (n) increases because there are more electron shells.

68) The expected number of valence electrons in an atom of Flerovium in the ground state is; 4 valence electrons.

66) The elements in group 14 of the periodic table are; Carbon, Silicon, Germanium, Tin, Lead, Flerovium.

Among all these elements, the only one that is a Metalloid is Silicon and Germanium.

67)When moving down a group in the periodic table, the number of energy levels (n) increases because there are more electron shells and as a result, there will be a greater distance between the nucleus and the outermost orbital. This distance is called atomic radius and it means it increases down a group.

68) Flerovium has 114 electrons and the shell structure is; 2, 8, 18, 32, 32, 18, 4.

4 is the last number and as such it has 4 valence electrons in it's outermost shell.

Read more about atomic radius down a group at; https://brainly.com/question/22632407

Otras preguntas