What are the two most abundant elements by mass in the earth’s crust, oceans, and atmosphere? Does this make sense? Why? What are the four most abundant elements by mass in the human body? Does this make any sense? Why?

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: Mention who discovered Boron and how, as well as the general properties of the Boron family group.

A: Boron was discovered by Joseph-Louis Gay-Lussac and Louis-Jaques Thénard, French chemists, and…

Q: Write balanced chemical equations for the following reactions:(a) cadmium burned in air(b) elemental…

A: (a)

Q: Write the equation for the reaction of:(a) Iron with steam(b) Calcium with water(c) Potassium with…

A:

Q: Give some examples of Metallic hydrides?

A: The examples of metallic hydrides has to be given.

Q: (a) What is the range of oxidation states shown by the elements of Group 5A(15) as you move down…

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Q: List and explain the unique characteristics of hydrogen?

A: Hydrogen element has different properties and characteristics in the whole periodic table. After…

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: Fertilizers commonly contain compounds of which element? a) nitrogen b) aluminum c) fluorine d)…

A: Fertilizers are the chemical substances that provides to the crops or plants to increase their…

Q: What are amphoteric oxides? Give two examples of amphoteric oxides.

A: Oxides of metals which have both acidic as well as basic properties are called amphoteric oxides.…

Q: The melting points of alkaline earth metals are many times higher than those of the alkali metals.…

A: Alkaline Earth Metals have two valence electrons while the alkali metals have one valence electrons.…

Q: What does the term Oxyacid mean in technical language to chemists? What are the similarities and…

A: A question based on general chemistry that is to be accomplished.

Q: What is the valence electron configuration for the Group 3A elements? How does metallic character…

A:

Q: How many electrons does a halogen atom need to complete its octet? Give examples of the ways a Cl…

A: The number of electrons that are needed to halogen atom to complete its octet has to be given and it…

Q: Define the term Halogens?

A: The term Halogens has to be defined below.

Q: The elements sodium, aluminum, and chlorine are in the same period. (a) Which has the greatest…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: Explain how atomic properties, such as ionization energy and electron affinity, relate to the…

A: Ionization energy is the minimum amount of energy that is required to remove the most loosely bound…

Q: A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true…

A: Few questions based on general chemistry that are to be accomplished.

Q: Nearly every compound of silicon has the element in the +4 oxidation state. In contrast, most…

A: Elements of a particular group shows similarities in physical and chemical properties. But there…

Q: What is the role of (NH4)2HPO4? Give the balanced chemical equations for the reactions of Group IV…

A: 1. (NH4)2HPO4 (DAP): Diammonium phosphate is one of water soluble ammonium-phosphate salt. This salt…

Q: Does the metallic characteristic of a main-group element increase or decrease as we move down a…

A: The metallic characteristics of a main-group element increases as we move down a family because the…

Q: What safety precautions should be taken with selenium? I am preparing to remove selium from water…

A: Selenium is an essential metal for human and other animals, but taking higher doses can be harmful.

Q: This elements produced bright yellow flame when used in fireworks. * Ве Ca O Sr Mg Group 2 elements…

A: Answer Q=1 which element produce bright yellow flame when used in…

Q: Which noble gas is the most abundant in the universe? In Earth’s atmosphere?

A: Noble gases are the elements of group 18 of the periodic table. Another name given to them is inert…

Q: How is the process of producing purified water? Step by step and what machine or equipment to used…

A: Water is an essential substance which is composed of hydrogen and oxygen. It exists in 3 forms, viz.…

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: Compare and contrast the chemistry of group 1 elements with that of group 2 on the basis of the…

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Q: Write down the advanced steps of finding lead compounds?  Write at your own words

A: Lead compound is chemical compound that has pharmacological and biological  activity  which is…

Q: How do the acidities of the aqueous solutions of the alkaline earth metal ions change in going down…

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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: 5. Why do alkaline-earth metals as a group have higher densities than alkali metals? 6. Name the…

A: General

Q: The lanthanide elements react with oxygen to give compounds of the type Ln2O3 (where Ln stands for a…

A: a)  Given that : % mass of Tb = 73.945 % Thus, % mass of O = 100 - 73.945 = 26.055 % Let us consider…

Q: Explain why, at room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine…

A: A chemical compound consists of two or more different elements which are bonded with each other…

Q: Which alkali metal ion has maximum ionic mobility in aqueous solution?

A: The capability of ions to move upon the effect of electric field through a medium is termed as ionic…

Q: hydrogen is the building block of all other elements

A: Hydrogen is the atom having 1 electron and 1 proton and 0 neutron it has only one shell "s". it has…

Q: Why is it possible for an active metal like aluminum to be useful as a structural metal?

A: Active metals are those metals which can react actively with all other substance.  The properties of…

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: Suppose 10.00 g of an alkaline earth metal reacts with 10.0 L of water to produce 6.10 L of hydrogen…

A: The reaction of alkaline earth metal, X and water – X + 2H2O →XOH2 + H2

Q: What is the valence electron configuration for Group 4A elements? Group 4A contains two of the most…

A: In the periodic table, 4A group elements are those that have 4 electrons in the valence shell.…

Q: How do Groups 1A(1) and 2A(2) compare with respect to reaction of the metals with water?

A: Group 1A is called alkaline metal while the 2A is called alkaline earth metals. Both react in a…

Q: Write the chemical formula for each of the following compounds,and indicate the oxidation state of…

A: To determine chemical formula of compounds and indicate oxidation state of halogen: a). chlorate…

Q: Compare and contrast the chemistry of group 1 elements with that of group 2 on the basis of the…

A:

Q: Give the balanced chemical equations for the reactions of Group IV cations with (NH4)2HPO4.

A: Group IV cations are Ca2+ , Ba2+ and Sr2+ , these cations easily precipitated out by adding…