C) Justify each of the followings: 1) Nitrogen is very unreactive 2) Graphite conducts electricity 3) Metalloid has no constructional uses 4) Most representative metals never found as free element in nature 5) The elements in group 12 are not transition elements

Q: Calculate the mass change in grams bf the copper and nickel electrodes. mass change of copper…

A:

Q: A biochemist who is studying the properties of certain sulfur(S)–containing compounds in the body…

A: Sulphur belongs to group 16 of the periodic table , i.e, chalcogen family . Its atomic number  and…

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: Discuss the Production of the Halogens?

A: The production of halogens has to be discussed below.

Q: Give TWO reasons why aluminium metal was not commonly used till last century, even though it is one…

A: Two main reasons that elaborate the uncommon use of aluminum in the last century can be listed as…

Q: What is an extensive property? What is an extensive property of oxygen?

A: Extensive property is the property which depends upon the amount of matter or mass. Mass, volume,…

Q: Enlist and explain the ores of Beryllium and methods of production of Beryllium

A: Beryllium is the element in the periodic table having the symbol ‘Be’ and atomic number 4. It is a…

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: or selenium (#34)?

A:

Q: Calculate the packing fraction, mass defect and energy released in the formation of the argon atom.…

A: The packing fraction, mass defect and energy released in the formation of the argon atom are to be…

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: Aluminum, sulfur, and chlorine are elements found on the periodic table. Tests involving these three…

A: Metals have property that they are malleable and conducts electricity.

Q: Give reason for each of the following : (a) Molten alumina is a poor conductor of electricity. (b)…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

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: 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: 4. This question concerns the d-block elements, Sulphur, Nitrogen and Group IV elements,. (a) (i)…

A: (i) The main difference between d block elements and transition metals is that d block elements have…

Q: Use the periodic table to write the condensed electron configuration for Co [atomic no. =27].

A: Condensed valence configuration: It contains two parts; core electrons (electrons in Noble gas) and…

Q: Which is true elemental potassium? A. It is a nonmetal B. It is a group II element C. It is a liquid…

A: Potassium is an element present in along with the alkali metals in the first group of periodic…

Q: Select all of the following elements that are categorized as non-metals. OA. Ag O B. K O C.B O D.S O…

A: Non metals : These are the elements which are placed to right corner of the periodic table and have…

Q: Why is nitrogen innert

A: Nitrogen (N) is an element with atomic number 7 which exists as dinitrogen gas (N2) at room…

Q: What are the rare earth elements?

A: Elements is a term that is used in chemistry for a substance i.e. pure and which consists of atoms…

Q: 38. Which of the following statements is (are) true about lithium, a Group I element of the Periodic…

A: Interpretation -  To tell about which of statement is true about lithium , for a group-I element of…

Q: Each element: has unique physical properties O has unique chemical properties O is made of a single…

A: Element :- It is a pure substance consisting of same type of atoms that all have same number of…

Q: Write balanced equations for (a) U(a, n) Pu, (b) '#N(a, p)0, (C) Fe(a, B)Cu. 238 92 241 94

A: a) The balanced equation for below sample is, Uranium-238 undergoes nuclear fusion reaction with…

Q: How is iodine classified?

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles…

Q: Iodine (I) would have chemical properties most similar to which of the following elements Te Rb…

A: Generally we know In periodic table there are 7 periods and 18 groups. Now in a group, all elements…

Q: As pure elements, all of the halogens are diatomic molecular species. Their melting points are: F2,…

A: Astatine is a member of halogen group having no stable isotope.

Q: Discuss the application of thorium as a source of nuclear fuel

A: Thorium can also be used as alternative source of nuclear fuel due to following applications: There…

Q: What were two of the three reasons it took so long for lithium to be available for use in the United…

A: Lithium has its atomic symbol of Li. Its atomic number is 3. It is in the group of alkali metals. It…

Q: An electrical insulator is a material

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

Q: what is iodine 131 electronic arrangement

A:

Q: What is used as basis for the better arrangement of elements in the periodic table and the key to…

A: Basis for the better arrangement of elements in the periodic table and the key to the discovery of…

Q: 19 - Which of the given elements has similar properties with iodine (I) A) Br B) Te C) Ar D)…

A: Generally, the elements of a given group have similar properties due to similar general electronic…

Q: What are the similarities and differences between the lanthanides and the main groups?

A: Groups 1, 2 and 13 to 18 constitute the main group. In both, Lanthanide's and main group , the ionic…

Q: 79) 79.) In each of the following groups,which element is leost reuctive? Group ! a. b.Group 7 C.…

A: The most fundamental classification of the chemical elements is into metals and non-metals. Metals…

Q: Q5: The percentage composition of fuel is carbon to hydrogen ratio is 18, H = 5% , O = 2%, S 0.4%, N…

A:

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: Explain how the following properties change across the periodic Table from group 1 to group  2, and…

A: d) Melting point increases across a period.  Melting point is the  temperature at which a substance…

Q: Select from A to D the element 22 Which form a neutral oxide and an acid side Inllallalfv 23 Which…

A: Applying basic concepts of acid and base.

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: What is an alkali

A: Earlier, the alkalinity and acidity of a compound were determined by its taste. The alkali and acid…

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: . The 0:"O abundance ratio in some meteorites is greater than that used to calculate the

A:

Q: What is the core charge of oxide-15

A: The atomic number of oxygen-15 = 8

Q: Which of the following is not true? O a. The transition metals are characterized by partially filled…

A: