Which of the following elements are metals? C Ca Br Co Ni Ar Li Al O ?

Q: Which of the following are elements, which aremolecules but not compounds, which are compoundsbut…

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Q: MCQ 13: The element of group IV which is metal is A. Carbon (C) B. Germanium (Ge) C. Lead (Pb) D.…

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Q: Fill in the blanks by writing the name of the definition: is a substance made up of only a single…

A: an element is a substance that cannot be broken down into any other substance every element is made…

Q: the symbol of the halogen with the most electrons Express your answer as a chemical symbol. ΑΣφ ?

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Q: Which one of the following elements is a poor conductor of heat and electricity? iron lead fluorine…

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Q: Pb +4 and 0-2 Ca +2 and C -4 Ba +2 and P-3

A: A chemical formula of an ionic compound is formed by criss-crossing the valencies of their ions.

Q: The elemental symbols for an element are O 1or 2 letter symbols with the 1s* letter upper case and…

A: Each element has unique symbols.

Q: Which of the following are poor conductors of heat and electricity? O Transition elements O Halogens…

A: Elements can be classified into 3 forms, that is metals, non-metals, and metalloids. Metals are the…

Q: Which statement is true about elements? An element is made of only one kind of atom Water is a…

A: An element is defined as substance which contains same type of atoms, and no other atoms. Has a…

Q: Iodine and iodine Copper and sulfur Hydrogen and fluorine Carbon and oxygen

A: Given:   4.0 1.7                                                0.4…

Q: 1. Sodium 2. Lithium 3. Beryllium 4. Neon_ 5. Calcium 6. 1s²2s' 7. 1s°2s°2p°. 8. 1s 2s 2p³ 9. 1s'…

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Q: Does each chemical formula represent an element or a compound? a. H 2 b. H 2O 2 c. S 8 d. Na 2CO 3…

A: An element is made up of same type of atom whereas a compound is made up of more than 1 type of…

Q: 2. Methane can be disposed into two simpler solutions, hydrogen and carbon. Therefore, methane  a)…

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Q: Which pair of elements would you expect to exhibit the greatest similarity in their physical and…

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Q: Which pair of elements would you expect to exhibit the greatest similarity in their physical and…

A: Periodic table represents the systematic arrangement of elements in which the properties of these…

Q: 1. Describe the periodic table. 2. Where are the alkali metals and the halogens located on the…

A: Modern periodic table was first made by Dmitri Mendeleev. He is known as the father of periodic…

Q: O Fluorine O Carbon O Sodium O Calcium

A: Boron usually shows +3 oxidation state. It will react with negative oxidation state element.

Q: 7. Name the following compounds a. CI X Br Br b. C. d.

A: According to IUPAC nomenclature, select the longest chain of hydrocarbon which contains the maximum…

Q: Which two elements on the periodic table are in the same period? O Sn and Rb O K and Ba O F and Cl O…

A: The periodic table is divided into 18 groups and  7 periods.(i)  The 18 vertical columns that goes…

Q: 7. Name each of the following compounds: c. KMNO d. K,Cr,O, a. BaSO, b. NANO2

A: Some of the prefixes are used in naming the inorganic molecular compounds, they are listed below.…

Q: elements. (a) He (b) Pb (d) Ne (f) Ga (h) Br (c) Se (e) Cs (g) Sb

A: In the electron dot structure total number of Valence electron is shown. Valence electron…

Q: Which of the following compounds would contain 12 atoms of oxygen? Co(NO3)2 O Alz(HPO4)3 O NazCr207…

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Q: 1. Name the following compounds. Он b. HO,. OH а. с. F NO2 d. OH Br

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Q: Which of the following could describe an element?   I II III All of them None of them

A: Matter: Matter can be defined as any component which occupies space and has mass.

Q: How many of the following elements are metals? Ca Al Sn S As Bi

A: The properties of metals are--- Metals are solid in room temperature (except mercury), they are…

Q: Which of the following is a molecule, but not a compound? A) CO2 B) Ag C) NaCl D) N2 E) Ne

A: To identify the molecule which is not a compound.

Q: PHYSICAL CHARACTERISTICS OF THE FOLLOWING;  OXYGEN SILICON ARGON MAGNESIUM ALUMINUM IRON…

A: Interpretation -  To explain the physical properties of following metals -    Introduction -  In the…

Q: Which of the following is a chemical property? O Changing shape Melting point O Oxidizing…

A: Physical change: In a physical change the physical state of matter changes. In this change different…

Q: For each of the following elements, write its chemical symbol,determine the name of the group to…

A: Given: Five elements, (a) Potassium (b) Iodine (c) Magnesium (d) Argon (e) Sulfur

Q: Which of the following elements is a metal?   phosphorus nitrogen strontium fluorine argon

A: To find: The element that is metal

Q: 3. What type of substances are magnesium chloride, sodium chloride, and calcium chloride?

A: The question is based on the concept of chemical bonding. we have to identify the nature of…

Q: HO. 1) HBr 2)Mg 3) СО

A: ->HBr can give substitution reaction proceeds through formation of carbocation. ->Mg form…

Q: Nickel Oxygen Barium Tin Hydrogen Oxygen Calcium Sulfur Iron Carbon

A: On the basis of Electronegativity difference we can classify different Molecules as ionic , non…

Q: Which of the following elements fo Gold O Fluorine Hydrogen Sulfur Oxygen O Helium Olodine Antimony…

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Q: Which of the following elements is not a representative element? O Nickel Cadmium Silicon O Barium

A: I A, IIA, IIIA, IV A, VA, VI A, VII A, VIII A elements are called representative elements. Between…

Q: 1. Name the following compounds. он b. HO,. OH a. с. F. NO2 d. HOʻ Br

A: Since, you have posted multiple question, we will solve the first question for you. For any other…

Q: KMNO̟ + NaCI + H,SO, MNSO, + Na,SO, + K,SO,+ Cl, +

A: Let's start by assigning the oxidation states to all atoms:

Q: (c) 3.23 M K3ASO. lons: 04- O KAs* O AsO4

A: In  atoms, if count of electrons as well as  protons are identical then these atoms are neutral.…

Q: Which of the following is a chemical property? O Changing shape O Melting point O Oxidizing O…

A: A multiple choice question about chemical property.

Q: Which of the following elements is  NOT a noble gas at room temperature?  a. chlorine b. oxygen c.…

A: chlorine  oxygen nitrogen

Q: 2. Given the list of elemental symbols answer the following questions: F Sr Ne K Cr Kr Te Fr Cl Mg…

A: Since you have posted multiple questions and your question has multiple sub-parts, we will solve…

Q: Which pair of elements would you expect to exhibit the greatest similarity in their physical and…

A: The properties of elements are dependent over their electronic distribution. The similarity in the…

Q: hydrogen peroxide → water + oxygen List two physical / chemical properties for each compound

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Q: 113. Name each of the following compounds: a. Cul b. Cul2 f. S,N4 g. SF4 с. Col d. Na,CO3 h. NaOCI…

A: Name is given to the compound for their identification. As there are lots of compounds of an element…

Q: e+ lithium n phosphate + lithium

A: Reaction is based on electrochemical series.  Balanced chemical reaction  1.  Fe + Cu(NO3)2 ---->…

Q: RÜNO, BeF2 à + 4) Be(NO3)2 + RbF

A: The question is based on the concept of chemical reaction. a reaction has been provided. we have to…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.