Give TWO reasons why aluminium metal was not commonly used till last century, even though it is one of the most common elements on earth. (b) Why are copper and lithium such important elements today?

Q: Sulfur

A: Sulfur is a non-metal element present in periodic table of Group 16.

Q: What are lanthanide elements?

A: What are lanthanide ?

Q: Which of the following statements are true?(a) Both nitrogen and phosphorus can form a…

A: a) Both nitrogen and phosphorus can not form a pentafluoride compound. Nitrogen can not form…

Q: What substances are present, and what are their masses, after the reaction of 10.00 g ofmagnesium…

A: THE IDEA HERE IS THAT CHEMICAL REACTIONS MUST OBEY THE LAW OF MASS CONSERVATION , WHICH STATES THAT…

Q: How do atomic properties account for the low densities of the Group 1A(1) elements?

A: Alkali metals are the s-block elements belonging to the group IA(1) in the periodic table. The…

Q: How do atomic properties account for the low densities ofthe Group 1A(1) elements?

A: Alkali metals are the s-block elements belonging to the group IA(1) in the periodic table. The…

Q: 1 B,0, + 3 Mg → 3M9O + 2 B 5. (a) How many grams of boron can be obtained from 10.00g of B,0,? (b)…

A: Given balanced equation is as follows. 1B2O3+3Mg→3MgO+2B

Q: Which of the following set of elements contain only type II metals? O Na, Ca, Mg O Mn, Cd, Co O Ni,…

A:

Q: What is the difference between iron and steel? What is the difference between wrought iron and cast…

A: In the earth's crust metals occur both in combined state in the form of minerals as well as in the…

Q: A4 Each alkali metal reacts with water to give hydrogen gas and an hydroxide (a base). eg: lithium +…

A:

Q: What is Manganese ?

A: The arrangement of elements in increasing order of atomic number in the tabular form is termed…

Q: a 0.500 g sample of impure magnetite (Fe3O4) is converted by chemical reactions to Fe2O3(159.69…

A: The question is based on quantitative analysis. we have to find out percentage iron oxide present in…

Q: Why is zinc not regarded as a transition element?

A: Transition metal has incomplete d subshell in one or more than one oxidation state.

Q: Is boron the sole nonmetallic element of group 3A?

A: A nonmetal is an element that mostly lacks the characteristics of a metal. Physical characteristics…

Q: What are the two most abundant elements by mass in the earth’s crust, oceans, and atmosphere? Does…

A: The main composition of amino acid is carbon, oxygen, hydrogen, and nitrogen. Since Earth's crust…

Q: If copper is able to displace magnesium, and magnesium is able to displace lead, what does this mean…

A: From the given data we can infer that , Copper is more reactive than magnesium , and Magnesium is…

Q: Explain in detail the process of production of beryllium.

A: Beryllium is a chemical element having symbol Be and atomic number 4 having electronic configuration…

Q: Describe the chemical and physical properties of Potassium ?

A: Potassium (symbol K) is an element of the group 1 (alkali metals) of the periodic table. The atomic…

Q: Do you expect fluorine to be the strongest or weakest oxidizer among the halogen family? Which halid…

A:

Q: How many kilograms of nickel must be added to 2.43 kg of copper to yield a solidus temperature of…

A:

Q: Would you expect manganese(II) oxide, MnO, to react morereadily with HCl(aq) or NaOH(aq)?

A: Manganese(II) oxide (MnO) is a metal oxide and it can readily react with acids to form its salt and…

Q: What are the two most abundant elements by mass in the earth's crust, oceans, and atmosphere? Does…

A: In atmosphere, Nitrogen and oxygen are most abundant elements as N2 gas compared of 78 % and 21 % O2…

Q: A sample of soda-lime glass for tableware is analyzed and found to contain the following percentages…

A: Given- % by mass of oxides SiO2 = 72.4% Na2O =18.1% CaO = 8.1% Al2O3 =1.0% MgO = 0.2% BaO = 0.2%…

Q: 7. What is the role of Pd in the production of H,0, seen in this reaction? Explain the process…

A: Hydrogen peroxide is a usefull oxidising agent. It is a desirable oxiadnt because the only by…

Q: Describe the physical properties of metals?

A: The physical properties of metals has to be given,

Q: An electrical insulator is a material

A: An insulator can be considered as a pure chemical element.

Q: Describe the chemical reactions of lanthanides in detail?

A: Lanthanides (Ln): The elements that exist at the bottom of the periodic table that is from atomic…

Q: What is the metal activity series? Please write it. Why is iron more reactive than copper?

A: Metal activity series is a sereis consists of metal in a specific sequence which indicates their…

Q: (a) One of the alkali metals reacts with oxygen to form a solidwhite substance. When this substance…

A: The periodic table is the representation of the elements in the increasing order of their atomic…

Q: Write a balanced equation for the reaction of elemental strontium with each of the following:(a)…

A: Interpretation - To write a balanced equation for the reaction of elemental strontium with each of…

Q: Provide two reactions for rubidium which are of high importance. They could be reactions of wide…

A: Imoprtant reactions of rubidium: Rubidium (Rb), a element of Group 1 in the periodic table, an…

Q: Give 5 behavior and properties of metallic bonding

A: ANSWER IS DISCUSSED BELOW :

Q: How  could you separate tellurium dioxide, TeO2 from SiO2

A: The method to separate tellurium dioxide, TeO2 from SiO2 is to be explained.

Q: Would the reaction of cesium, Cs, with oxygen be more or less vigorous than K?

A: We are given two elements K and Cs

Q: What could explain the simultaneous increases in the price of lithium and the production of lithuim.

A: Lithium is an alkali element belongs to s block of periodic table .

Q: Write detailed answers to the following. a. What are different stages of the development of…

A: Given: a) Periodic table b) Carbon, nitrogen and oxygen To find: a) different stages of periodic…

Q: Which is a zinc ore and is used in paints, sunscreen and coins? A. Anhydrite B. Bauxite C.…

A:

Q: Simplified explanation of nitride and carbon in minerals, simplified explanation of the mechanism of…

A: Explanation- @ Nitride in minerals-       In chemistry, a nitride is a compound of nitrogen where…

Q: (ii) Explain why, in the synthesis of nitric acid, the reaction of nitrogen monoxide with dioxygen…

A: Due to the following reason Nitric acid is prepared at high pressure and low temperature.

Q: Why does table salt, NaCl, some times appear yellow in colour?

A: All matter can exist in different physical states; solid, liquid and gases. Solid is well known…

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.