ead about Eu. What does its symbol stand for? What is its atomic number? How is it produced? Boron (Si, Ge...) is part of what category of elements? Where is it most widely distributed? What is the most widely used Silicon device? Watch the TED on the genius of Mendeleev. List two things you learned Why did Mendeleev's table endure? Watch the Crash Course in Chemistry (11:21) What is meant by the periodic nature of the table? What are alkali metals, how do they behave, and why? What are the transition metals and describe them and their importance. What are the Lanthanides and Actinides? What are Noble Gases?

Q: Part 4 3 compounds with elements from groups 2A and 5A Part 4 Chel Compund Catlen

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Q: Which of the following is TRUE for Anion 1. Has more electrons than protons II. Has lesser electrons…

A: Anions  : anions are formed when an atom gains one or more than one electrons .

Q: Draw the structural formulas for three isomers of pentane,C5H12.

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Q: 7. Our current model for how elements bond to form compounds uses the idea that they bond to reach 8…

A: According to this rule, elements have tendency to fill 8 electrons in their respective valence…

Q: Anhydrous CuSO4 is converted to CuSO4・xH2O to absorb water from certain liquids. What is the value…

A: We have to predict the value of x.

Q: Assign reason to the following :(i) Noble gases have large positive values of electron gain…

A: Given statements, (i) Noble gases have large positive values of electron gain enthalpy.(ii) Helium…

Q: In what way is the lightest hydrogen unique?

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Q: we have four potatoes.  Two are connected by a string, so they're tied together.  Two are just…

A: In  N2 both nitrogen atoms tied with triple bond  and form  linear structure.

Q: QUESTION 4 What kind of carbon atom is circled in the following chemical structure? O A. 1° O B. 2°…

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Q: प्रिो। Classwork for Chemistry 1-2022 X Nearpod Endothermic and Exot x + b…

A: The correct answer about endothermic reaction is given below

Q: Consider the structures of greenhouse gases, CO2 and CH4. Carbon dioxide has a very long lifetime in…

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Q: 1. The chemical formula of methane is CH4. The Lewis Structure of methane is shown below. Explain…

A: Answer 1: Chemical formula:- It represents only the atoms and the type of atoms present in the…

Q: Which type of chemical formula/model provides the most information about a given substance? (a) All…

A: In case of Lewis  structure we get the complete information about the given substance , Lewis…

Q: Which one of the following statements is false? Group of answer choices   -Water is the most…

A: In green house gases about 60% of green house effect depends upon the water vapour because water is…

Q: the existence of life beyond the earth, we have to search all these seven elements i. e. carbon,…

A: 8.As phosphorus and arsenic have approximate similar camical properties, so that arsenic substitute…

Q: . Name the following compound, BrF5 a. Bromine pentafluoride b. Bromine fluoride c. Bromine (IV)…

A: (9) Different type of compounds have different names according to the central atom present in them…

Q: 1. An instructor gave you direction to construct a model of CH3CH2Br molecule by following the…

A: Note: According to the rules we can answer only first question at a time. Pls repost others.  Given:…

Q: 2p 2s 1s 30 17g 30% 1u 201 20 101 10g Q2/ Complete the following diagram for the carbon molecule…

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Q: Identify and analyze the way fossil fuel combustion has changed the composition of Earth's…

A: The burning of fossil fuels refers to the burning of oil, natural gas, and coal to generate energy.…

Q: <p>Explain why the diatomic nitrogen atom is unusable by most plants. Where do plants get…

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Q: What is the mass of a benzene ring that has lost one hydrogen? Assume the benzene ring contains only…

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: MCQ 108: The highly reactive element which can burn glass, metals, and water in a stream of gas is…

A: Reactivity of non metals is majorly determined by their reduction potentiol.

Q: The halogens are all in the same group. What is the pattern in reactivity as you go down group 7A?…

A: To  Does the reactivity increase or decrease, as we go down from F to CL to Br to I? How is this…

Q: calculate the mass of the distillate_______________ and the density of the distillate.  use the…

A: Given,      Mass of the Empty graduate Cylinder = 5.280 grams      Mass of the Cylinder with…

Q: Which of the following nonmetals is the most chemically reactive? nitrogen neon…

A: Nonmetals are the elements that are present in the right side of the periodic table.  They do not…

Q: [References] Ammonium bicarbonate, NH,HCO3, contains both ionic and covalent bonds. Draw the Lewis…

A: Ammonium bicarbonate  NH4HCO3   The valence electrons present in  N = 5  , C = 4 H = 1  , O = 6…

Q: How many rbonds are there in one molecule of acrylonitrile (shown below)? H C C-C N: 3. 1 O 2

A: In this question, we want to determine the number of π-bonds in the given Compound.  You can see…

Q: 100% Normal text Open Sans BIUA 12 3 5. What are the properties of water that make it important for…

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Q: Write an equation for the following reactions. Remember the gases of elements such as oxygen are…

A: The balanced reaction and products of reaction can be written from nature of reactants.

Q: 5 ,CO,, Be H,, PE examples: CH

A: Given Question answer is as follows first 3 according to our guidelines.

Q: Compare/Contrast elemental and ionic lead in chemical & physical properties and their effect on…

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Q: Aluminium and Hydrogen atoms are combined to form НАI НЗАI AIH4 AIH3 AIH

A: An ionic compound is formed by the Criss cross of valences.

Q: Anhydrous CuSO4 is converted to CuSO4・xH2O to absorb water from certain liquids. What is the value…

A:

Q: 15 I11 Na Quick Comprehension Choices (highlight the correct choice) 1. Na (gained or losty an…

A: The ionic bond is formed between Na & F atoms. Now we have to select  and highlight correct…

Q: E is a made up element and contains 6 valence electrons Y is a made up element and contains 7…

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Q: What is the greenhouse effect? How does the excess  CO2 gas in the atmosphere cause the greenhouse…

A: The warming of the earth's surface due to the accumulation of some gases in it is known as…

Q: Consider these statements about an element E in Group SA E is essential to life, found in bones,…

A: Phosphorous is Group 5A element. Phosphorous is one of the essential element to life. Phosphorous…

Q: Choose 1 element under Group 2, 4 & 6 and draw their Lewis structure. And predict how many electrons…

A: An element becomes stable when it obeys octet rule, which states that outermost shell should have 8…

Q: In which of the following molecules do the electrons have the most chemical energy, especially those…

A: In the process of photosynthesis, plants convert light energy into chemical energy. The reaction of…

Q: The greenhouse effect is caused by… Group of answer choices too much sunshine reaching Earth…

A: Greenhouse effect is the trapping of heat in the Earth's surface by green house gases.

Q: How is the term "organic" used among farmers and food stores today? Carbon's atomic number is six.…

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Q: 1. Compare cations, anions, and polyatomic ions. What do they all have in common? How are they…

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Q: Building ionic compounds from seawater can you help me move ions to make neutral compounds one type…

A: A set of anions and cations using which neutral compounds are to be made.

Q: There are three sets of sketches below, showing the same pure molecular compound (carbon monoxide,…

A: A question based on matter that is to be accomplished.

Q: Not a Molecule, Not a Compound Compound (ALSO a Molecule) Drag and drop each of the chemical…

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Q: What are the chemical equations of the following:  CuSO4 + HCl CoCl2 +HCl Ni(NO3)2 +HCl

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Q: The radius of a spherical aluminum atom is 140 pm. How many aluminum atoms could fit lines across…

A: The vertical length of the page is provided. The width of the page or the shape of the page is not…

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.