All questions
- Write short notes. a. Mendeleev’s periodic law. 1) Mendeleev organized the period table on the basis of atomic masses of elements. 2. When he arranged the 63 elements known at that time in... 1
- 5. Write the name and symbol of the element from the description. a. The atom having the smallest size. a. The atom having the smallest size. Hydrogen (H) b. The atom having the smallest atomic mass. Hydrogen (H) c. The most electronegative ato... 1
- h. 6C, 3Li, 9F, 7N, 8O Which of the above elements has the highest nonmetallic character? ₆C, ₃Li, ₉F,₇N, ₈O elements and thier electronic configuration: ₆C=2,4 ₃Li=2,1 ₉F=2,7 _( 7)N=2,5 ₈O=2,6 The element with the highest nonmeta... 1
- g. 13A1, 14Si, 11Na, 12Mg, 16S Which of the above elements has the highest metallic character? ₁₃Al, ₁₄Si, ₁₁Na, ₁₂Mg, ₁₆S Element and thier electronic configuratio : ₁₃Al=2,8,3 ₁₄Si=2,8,4 ₁₁Na=2,8,1 ₁₂Mg=2,8,2 ₁₆S=2,8,6 The element wi... 1
- f. 19K, 3 Li, 11Na, 4 Be Which of these atoms has smallest atomic radius? ₁₉K, ₃Li, ₁₁Na, ₄Be elements and thier electronic configuration: ₁₉K=2,8,8,1 ₃Li=2,1 ₁₁Na=2,8,1 ₄Be=2,2 The element with the smallest atomic... 1
- e. 11Na,15P,17Cl, 14Si, 12Mg Which of these has largest atoms? ₁₁Na,₁₅P,₁₇Cl, ₁₄Si, ₁₂Mg element an thier electronic configurations: ₁₁Na=2,8,1 ₁₅P=2,8,5 ₁₇Cl=2,8,7 ₁₄Si=2,8,4 ₁₂Mg=2,8,2 The element whic... 1
- 4 Be, 6 C, 8 O, 5 B, 13A1 Which is the most electropositive element among these? ₄Be, ₆C, ₈O, ₅B, ₁₃Al elements and thier electronic configuration : ₄Be=2,2 ₆C=2,4 ₈O=2,6 ₅B=2,5 ₁₃Al=2,8,3 The most electropositive element... 2
- 7N, 6C, 8O, 5B, 13Al Which is the most electronegative element among these? ₇N, ₆C, ₈O, ₅B, ₁₃Al Elements and thier electronic configuration ₇N=2,5 ₆C=2,4 ₈O=2,6 ₅B=2,3 ₁₃Al =2,8,3 The most electronegative element is... 1
- b. 1 H, 7 N, 20Ca, 16S, 4 Be, 18Ar Which of these elements belong to the second group? ₁H, ₇N, ₂₀Ca,_( 16)S,_( 4 )Be, ₁₈Ar Electronic configuration of atoms :: ₁H=1 ₇N=2,5 ₂₀Ca=2,8,8,2 _( 16)S=2,8,6 _( 4 )Be=2,2 ₁₈Ar=2,8,8 Amon... 1
- a. 3Li, 14Si, 2He, 11Na, 15P Which of these elements belong to be period 3? Electronic configuration of the following elements is: ₃Li = 2,1 ₁₄Si =2,8,4 ₂He= 2 ₁₁Na = 2,8,1 ₁₅P = 2,8,5 According to electronic configu... 1
- 3. An element has its electron configuration as 2,8,2. Now answer the following questions. a. What is the atomic number of this element? 1) The atomic number of this element is 12 b. What is the group of this element? 2) This eleme... 1
- d. In which block of the modern periodic table are the nonmetals found? In P-Block block of the modern periodic table are the nonmetals found . Correct answer is option 2) P-block 1
- c. Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Which of the following element... 1
- b. Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in .... Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in Group 2 1
- a. The number of electrons in the outermost shell of alkali metals is...... (i) 1 (ii) 2 (iii) 3 (iv) 7 The number of electrons in the outermost shell of alkali metals is 1 1
- how to know the answer is relavant ? You can find relavant answer Conditions :: 1) Check whether answer is selected as best or not ? This symbol means best answer , check if the... 1
- 1. Rearrange the columns 2 and 3 so as to match with the column 1. Ans. (i – c – 5 ) , (ii – d – 3) , (iii – e – 6 ) , (iv – f – 1) , (v – b – 4), (vi - a – 2). Column 1 Column 2 Column 3 i. Triad c. Average... 1
- Take weights of five of your friends. Find out what their weights will be on the moon and the Mars. Take weights of five of your friend find out what their weights will be on the moon and the mars Let the weights of my friends a,b,c,d,e be... 3
- A cylindrical vessel containing a liquid is rotated about its axis so that the liquid rises at its sides as shown in the figure. The radius of vessel is Correct option is A) 25ω²/2g Explaination:: Applying pressure equation from A to B p_o+ρ.Rω²/2.R-ρ gh= p_o ρ.R²ω²/2=ρ gh h=R²ω²/2g=5²ω²/2g=2... 1
- If intensity after passing through a polaroid is 100 Lumen. Now this same polaroid is rotated by 30° about it's axis then The correct answer is option 2) 100 lumens I_(p_1)=I_p2=100 Lumens 1
- std 10th maharashtra board science part 1 gravitation notes Download pdf for offline study 1. study the entries in the following table and rewrite them putting the corrected items in a single row :gra... 2
- g. The mass of the earth is 6 x 1024 kg. The distance between the earth and the Sun is 1.5x 1011 m. the mass of the earth, m = 6 × 10²⁴ kg Assume the mass of the sun is M distance between earth and sun , r = 1.5 × 10¹¹ m force between sun a... 1
- f. The masses of the earth and moon are 6 x 1024 kg and 7.4x1022kg, respectively. The distance between them is 3.84 x 105 km. Given : Mass of the Earth(m₁) = 6 × 10²⁴ kg. Mass of the Moon(m₂) = 7.4 × 10²² kg. Distance between the Earth and the Moon(d) = 3.84 × 10⁵ k... 1
- e. A ball falls off a table and reaches the ground in 1 s. Assuming g = 10 m/s2 , calculate its speed Given: t=2s , g=10 m/s² , u=0 , a=g , s=? , v=? Solution : s=ut+1/2 gt² = 0× 1+ 1/2 (10)(1)² = 1/2 (10) s= 5m v=u+gt =0+10*1 v=10 m/s The an... 1