which is one of the most abundant element in the universe?

Q: Which of the following statements is (are) C true about lithium, a Group I element of the Periodic…

A: The facts about LIthium are: It is an alkali metal (group I element). It has an atomic number = 3…

Q: what is the chemical formula for potassium phosphate

A: Potassium phosphate is a common term for salts of potassium and phosphate ions.

Q: What are lanthanide elements?

A: What are lanthanide ?

Q: III. Name one element in the Halogen Group.

A: Halogen group means, group 17 element in the periodic table. see below

Q: write formation equations for four transition metals

A: We have to write the four formation equation of translation metal .

Q: What is lithium?

A: Pure substances that are made up entirely of atoms and have the same number of protons in their…

Q: phosphate

A: Ionic compound form between metal and non-metal by the complete transfer of electron.

Q: Why is nitrogen more elctro negative than sodium?

A: Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond.

Q: what is the physical state of element Co? what is the physical appearance of element Co? what is…

A: Cobalt is a d - block element. It's atomic number is 27 and atomic mass is 58.933 g/mol. It is…

Q: What will happen to calcium phosphate Ca3 (PO4) 2 when heated from 60 ° C to 100 ° C?

A: The solubility product of Ca3(PO4)2 is 2.0 X 10-29

Q: In what physical state does chlorine exist at −65°C?

A: The physical state of an element depends upon its boiling point and melting point temperatures.

Q: Some properties of element Y are listed. It reacts with hydrochloric acid to make hydrogen gas. It…

A: 1. Mg +2HCl  → MgCl2  + H2 2. Mg  + H2O → MgO + H2 Magnesium burns in steam to produce white…

Q: What is the chemical property of iron nail

A: Iron nail is made up of iron and it is the tendency of iron to get oxidized in the presence of…

Q: The balanced equations of the separate reactions of rubidium and magnesium with water are…

A: • We need to write the balanced chemical equation of -  i) rubidium with water and  ii) magnesium…

Q: Group IV (group 14) of the periodic table because 1. It forms an acid and a neutral oxide 2. it is…

A: The question is based on the concept of periodic properties. we have identify the properties which…

Q: Can you identify the lead (wire) color that represent the cathode?

A: Basically in electrolysis the red color wire indicates anode as a positive electrode at the same…

Q: Whats the chemical and physical properties of Potassium ?

A:

Q: Name two elements that occur in the free metallic state in nature.

A: The metals which are least reactive in nature can be found in free metallic state. Their reactivity…

Q: For question 16 to 18, refer to the following Periodic Table. a h i k e d 16. Which of the following…

A: Periodic table is arrangement of elements on the basis of atomic masses.

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: _1. A giver of 2 electrons. _2. The element in the group I would be

A: 1) elements of group 2 generally lose two electrons to get the noble gas configuration. 2) group 1…

Q: What did the Mercury (II) oxide reactant look like, and what did the products of the decomposition…

A: Mercury(II) Oxide looks like red solid. When it was heated to higher temperature, it will produce…

Q: Which of these three elements ( Cl2, Br2, I2) is most volatile?

A: The volatility of a compound depends on the intermolecular force present in it. The higher the…

Q: The chemical analysis of a macromolecule has been provided. What is this macromolecule? Element…

A: The empirical formula of any compound can be determined by using the percentage mass composition of…

Q: What is boron

A: We have to explain what is Boron.

Q: Complete and balance the following equations: (a) NaH(s) + H,O(1) (b) Fe(s) + H,SO,(aq) (c) H2(8) +…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: what is the chemical formula for calcium phosphate?

A: First write the name of cation and then name phosphate with their charge  For writting a compound…

Q: Which of the following statements is INCORRECT? Germanium is classified as a metal. Lead is…

A:

Q: What is an alkali? Give an example.

A: Given What is an alkali? Give an example.

Q: what element would you expect to be very stable and unlikely to react with other elements

A: Given property of the elements,       Very stable and unlikely to react with other elements

Q: Oxygen is the most abundant element in the earth's atmosphere.  True  False

A: Given statement is, Oxygen is the most abundant element in the earth's atmosphere

Q: Which instrument can be used best to detect metals in Water like POTASSIUM?

A: potassium is very reactive element and it reacts even in water and air .

Q: On your paper, write the complete balanced equation for the combination of rubidum and sulfur. In…

A:

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: What is the chemical formula for sodium perchlorate?

A: The chemical formula - It is the representation of the chemical composition  of the compound

Q: Which has the most potential energy K Rb Na Li

A:

Q: ÇI CO,Na Structure Y Structure Z

A: This is simple an acid - base reaction

Q: what are the interesting properties  of  phosphorus

A: The interesting properties of phosphorus has to be given.

Q: Classify each of the following as an oxide, acid, base or salt.

A: 1. AgCl is salt 2. Oxide 3.base 4.salt 5.bromous acid

Q: The Group 1A elements A) melt at high temperatures B) are unreactive and are rarely found in…

A: Group 1A element are also called alkali metals. Li, Na, K, Rb, Cs.  Group I elements have 1 valence…

Q: does hydrogen exist as an atomic element in the air?

A: Interpretation: Does hydrogen gas exist as an atomic element in the air is to be determined.

Q: what is the physical state of element Pb? what is the physical appearance of element Pb? what is…

A: Physical state of element Pb is solid at room temperature. Physical appearance of element Pb is…

Q: Magnesium (3) (8) (12) Potassium Aluminum Copper (2) (7) (11) (14) Calcium Sodium (5) (1) (6) (10)…

A: A question based on electrochemistry and quantitative analysis, which is to be accomplished.

Q: QUESTION 9 Which element in period #6 has similar chemical properties to Magnesium? а. Si b. Ra Са…

A: Magnesium is a metal having atomic number 12. The distribution of electron in various shell is…

Q: Explain why the first innization energy of Ca is greater than that of K, whereas the second…

A: The first ionization energy of Ca is greater than that of K, whereas the second ionization energy of…

Q: If 5.3 g of gallium reacts with 5.3 g of oxygen to produce gallium oxide, what will we be left with…

A: Limiting reactant :-  A reactant whose number of moles are less than the number of moles  required…

Q: which element is a metal in period 5 of the periodic table

A: Periodic table:In a periodic table elements are arranged by atomic number, electron configuration,…

Q: In the following How many N atoms How many H atoms How many Cr atoms How many O atoms 4 (NH,)½C12O,

A: ANSWER IS

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.