Question

Помогите срочно!!! 1 назовите элемент и составьте схему строения атома и электронную формулу.укажите свойства(металическ.,неметаллическ.,амфотерные): находится в 2 группе относительная масса гидроксида 58. 2 .массовая доля металла с порядковым номером 11 составе нитрата равна: А 12 % Б27% В54% Г60% 3 .укажите тип хим.связи и составте электронные схемы образования соединений: А. CH4- Б.N2- В.CaS- тип связи 1 2 3

Answer 1

Отвечу то, что знаю. 2. Б 3. А-ковалентная полярная Б-ковалентная неполярная В-ионная

Answer 2

Element and Atomic Structure:

The element in question is not specified in the question. However, since it is mentioned that the element is in the 2nd group, we can assume that it is an alkaline earth metal. Alkaline earth metals are located in Group 2 of the periodic table and include elements such as beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

The atomic structure of an atom consists of a nucleus containing protons and neutrons, surrounded by electrons in energy levels or shells. The number of protons in the nucleus determines the atomic number of the element, while the total number of protons and neutrons determines the atomic mass.

The electronic configuration or electron arrangement of an atom represents the distribution of electrons in its energy levels. It is usually written using the notation 2-8-8-2, where each number represents the maximum number of electrons that can occupy each energy level.

Unfortunately, without knowing the specific element, it is not possible to provide a detailed atomic structure and electron configuration. Could you please specify the element you are referring to?

Properties of the Element:

The properties of an element can vary depending on its position in the periodic table. However, since the element is mentioned to be in the 2nd group, we can assume that it is an alkaline earth metal. Alkaline earth metals generally have the following properties:

- Metallic: Alkaline earth metals are typically metallic in nature, meaning they are good conductors of heat and electricity. - Reactive: They are highly reactive, although less reactive than alkali metals in Group 1. - Amphoteric: Alkaline earth metals can exhibit both basic and acidic properties, making them amphoteric in nature.

Again, please specify the element you are referring to for more accurate information.

Mass Fraction of Metal in Nitrate:

The question states that the mass fraction of the metal with atomic number 11 in the composition of the nitrate is given. The possible options are:

- A. 12% - Б. 27% - В. 54% - Г. 60%

Unfortunately, the specific element is not mentioned, so it is not possible to determine the correct answer. Could you please provide the name or symbol of the element?

Type of Chemical Bond and Electron Dot Diagrams:

The question asks for the type of chemical bond and the electron dot diagrams for the following compounds:

- А. CH4 (methane) - Б. N2 (nitrogen) - В. CaS (calcium sulfide)

The type of chemical bond can be determined based on the electronegativity difference between the atoms involved. If the electronegativity difference is large, an ionic bond is formed. If the electronegativity difference is small, a covalent bond is formed.

- А. CH4 (methane): Methane consists of one carbon atom bonded to four hydrogen atoms. Carbon and hydrogen have a small electronegativity difference, so a covalent bond is formed. - Electron Dot Diagram: H : C : H : H : H

- Б. N2 (nitrogen): Nitrogen consists of two nitrogen atoms bonded together. Since both nitrogen atoms have similar electronegativities, a covalent bond is formed. - Electron Dot Diagram: N ≡ N

- В. CaS (calcium sulfide): Calcium sulfide consists of one calcium atom bonded to one sulfur atom. Calcium has a lower electronegativity than sulfur, resulting in an ionic bond. - Electron Dot Diagram: Ca [2 dots] : S [6 dots]

Please let me know if there is anything else I can help you with!