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When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser. 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh The non-metal A is an important constituent of our food and most of the fuels around us. A forms two oxides B and C. Oxide B is poisonous whereas oxide C causes global warming. 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh Write the names and symbols of two very reactive metals belonging to group 1 of the periodic table. Explain by drawing electronic structure, how either one of the two metals reacts with a halogen. 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh Atoms of eight elements A, B, C, D, E, F, G, and H have the same number of electron shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound. This ionic compound is added... 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh Find the neutral atom in the periodic table which has the same number of electrons as K^+ and Cl. What is this number? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh The elements A, B and C belong to groups 1, 14 and 17 respectively of the periodic table. (a) Which two elements will form a covalent compound? (b) Which two elements will form an ionic compound? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh The following diagram shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e (which are not their chemical symbols): 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element X from group 2 of the periodic table reacts with an element Y from group 17 to form a compound. (a) What is the nature of the compound formed? (b) State, whether the compound formed, will conduct electricity or not. 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element A from group 14 of the periodic table combines with an element B from group 16. (i) What type of chemical bond is formed? (ii) Give the formula of the compound formed. 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh A metal X is in the first group of the periodic table. What will be the formula of its oxide? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element X from group 2 reacts with element Y from group 16 of the periodic table. (a) What is the formula of the compound formed? (b) What is the nature of bond in the compound formed? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element A has an atomic number of 6. Another element B has 17 electrons in its one neutral atom. (a) n which groups of the periodic table would you expect to find these elements? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting. (a) How many electrons would be there in the outermost shell of element X? (b) To which group of the periodic table does the element X belong? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong? (b) The element X forms a compound X2Y. Suggest an element that Y might be and give reasons for your choice. 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element Y is in second period and group 16 of the periodic table: (i) Is it a metal or non-metal? (ii) What is the number of valence electrons in its atom? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element X is in group 2 of the periodic table: (a) What will be the formula of its chloride? (b) What will be the formula of its oxide? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here are not the chemical symbols of the elements): 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh An element X belongs to 3rd period and group 2 of the periodic table. State: (a) number of valence electrons (b) valency (c) metal or non-metal (d) name of the element 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh The atomic numbers of three elements A, B and C are given below: Element Atomic number A - 5 B - 7 C - 10 (i) Which element belongs to group 18? (ii) Which element belongs to group 15? 3 years ago Jaiyush19 class 10 periodic classification elements lakhmir singh Page 1 / 5 1 2 3 4 5 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? Δ Home About Us Contact Us Privacy Policy Term of Use Copyright © 2020 Eanshub All Rights Reserved
