Consider the elements O, Ba, Co, Be, Br, and Se. From this list,select the element that (a) is most electronegative, (b) exhibitsa maximum oxidation state of +7, (c) loses an electronmost readily, (d) forms π bonds most readily, (e) is a transitionmetal, (f) is a liquid at room temperature and pressure.

Q: Calculate the enthalpies of formation, AH;, of group 1 chloride compounds from their elements by…

A:

Q: What correlation, if any, exists for the Period 2 elements between group number and the number of…

A: The number of electrons in an element is equal to its atomic number. In order to become stable an…

Q: Using the periodic table only, arrange the elements in each set in order of increasing EN: (a) S, O,…

A: Using the periodic table only, arrange the elements in each set in order of increasing EN: (a) S, O,…

Q: How are the molecules in the following pair related? H3C-Cl CH₂ CH₂ CI Select one: O A. III O B. II…

A: Isomers: compounds having the same molecular formula but having different arrangement of atoms in…

Q: Select the member of group 4A that best fits each description:(a) forms chains to the greatest…

A: A given element is said to be metallic in nature if it can lose electrons while it is non -metallic…

Q: Carbon is used in countless ways in a modern automobile, with the most visible use being carbon…

A: From bicycles to backpacks, carbon fibre is a popular material for high-end and long-lasting…

Q: Consider these statements about an element E in Group 4A: • The most important modern use of E is as…

A: Group 4A, also known as Group 14, is a group of elements in the periodic table. It includes the…

Q: Rank the following in order of increasing(a) Melting point: Na, Si, Ar(b), ΔH(fus): Rb, Cs, Li

A: The inter-atomic force present in sodium is metallic bonding. This force binds numerous sodium atoms…

Q: Which property of the group 6A elements might be the onedepicted in the graph shown here: (a)…

A: The 6A group is also called as oxygen family. The elements present in this group are oxygen, sulfur,…

Q: Xenon can react with fluorine and form chemical compounds. Write the simplest chemical formula for a…

A: Given that, Oxidation state of xenon (Xe) in its compound with fluorine (F) is "+2" We need to write…

Q: The diameter of a rubidium atom is 4.95 A° . We will considertwo different ways of placing the atoms…

A: (a) Given diameter = 4.95A0                         = 4.95 × 10-8 cm

Q: Which species below will require the most energy for the removal of a valence electron? (A) Na+ (B)…

A: When an electron is removed from the outermost shell of an isolated gaseous atom the amount of…

Q: The first two steps in the industrial synthesis of nitric acid produce nitrogen dioxide from…

A: K = K1 * K2 2

Q: 2. Calculate AH® for the reactions represented by the following equations: m (a) 2 H,(g) + 0,(g)→2…

A: It's a multiple part question.

Q: Energy is required to remove two electrons from Ca to formCa2+, and energy is required to add two…

A: The formation of both the ions of Cao requires energy. It means energy is required to remove two…

Q: Calculate the force of attraction between a K+ and an O2- ion the centers of which are separated by…

A: Coulomb's law is an expression used to calculate the force of attraction or repulsion between two…

Q: 8a) Sketch a diagram showing the formation of energy levels from the valence orbitals for Rb, Rb2,…

A: a). We are given a crystal of Rb The formation of energy levels from the valance orbitals for Rb,…

Q: Explain why sulfuric acid, H2SO4, which is a covalent molecule, dissolves in water and produces a…

A: When sulfuric acid is brought in contact with water, it starts behaving as a Bronsted–Lowry acid. It…

Q: 1. A thin wire of silver (Z=47, A = 107.87, face-centered-cubic, density = 10.49 g/cm³) is measured…

A: The objective of the question is to calculate the concentration of conduction electrons, mean free…

Q: Give the oxidation state of sulfur in (a) S₈; (b) SF₄; (c) SF₆;(d) H₂S; (e) FeS₂; (f) H₂SO₄; (g)…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: could you identify A and B?

A: (i) Element A is Selenium (Se). Explanation: Selenium is from the fourth long period (period 4),…

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.