Doubtly
@Doubtly · Joined Feb 2021
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- Name the element that shows simplest emission spectrum. Hydrogen shows the simplest emmission spectrum 2
- If an element ‘X’ has mass number 11 and it has 6 neutrons, then write its representation. The representation of the given element is ¹¹₅X 1
- 4. Match the following : Element No. of Neutron a. ⁴⁰₁₈AR iv. 22 b. ¹⁴₆C iii. 8 c. ⁴⁰₁₉K ii. 21 d. ¹⁴₇N i. 7 1
- Complete the following information about the isotopes in the chart given below : Substance Mass Number Number of Protons Neutrons Electrons Carbon-14 14 6 8 6 Lead-208 208 82 126 82 Chlorine-35 35 17 18 17 Uranium-238 238... 1
- Make the pairs: neutrons six electrons Answer:: ‘A’ ‘B’ a. Neutrons iv. Chadwick b. p-orbital i. six electrons c. charge on electron ii. -1.6×10⁻¹⁹ C d. Lyman series iii. Ultravio... 1
- Principal Quantum number describes a. shape of orbital b) size of the orbital 2
- “No two electrons in the same atoms can have identical set of four quantum numbers”. This statement is known as - a. Pauli’s exclusion principle 2
- p-orbitals are....... in shape. a. spherical b. dumb bell c. double dumbell d. diagonal b. dumb bell 2
- The value of Plank’s constant is - A) 6.626 × 10⁻³⁴Js 2
- The energy difference between the shells goes on ........... when moved away from the nucleus. b) decreasing 2
- [Science 2]SSC Science Question Paper 2020 - Part 2 - March - English Medium - Std 10th Maharashtra Board [Science 2]SSC Science Question Paper 2020 - Part 2 - March - English Medium - Std 10th Maharashtra Board To view online View To download fo... 1
- [Science 1]SSC Science Question Paper 2020 - Part 1 - March - English Medium - Std 10th Maharashtra Board [Science 1]SSC Science Question Paper 2020 - Part 1 - March - English Medium - Std 10th Maharashtra Board To view online View To download fo... 1
- [geometry]SSC Maths Question Paper 2020 - Part 2 - March - English Medium - Std 10th Maharashtra Board. [geometry] SSC Maths Question Paper 2020 - Part 2 - March - English Medium - Std 10th Maharashtra Board. To view online View To download for... 1
- The length of sides of a cuboid are a, 2a and 3a . if the relative percentage error in the measurement of a 1% , then what is the relative percentage error Correct answer is 3 1
- Dimensional analysis of the equation correct answer is 3 1
- The pressure on a square plate is measured by measuring the force on the plate and the length of the sides of the plate . If the maximum errors in the Correct option is d) 8% 1
- The length and breadth of a metal sheet are 3.124m and 3.002 m respectively. the area of this sheet up to the correct number of significant Correct option is A) 9.378 m² result must have significant figures equal to least figures being multiplid do area of metal sheet 9.378 m² (f... 1
- In the formula , a=3bc2 , a and c have dimensions of electric capicitance and magnetic field intensity respectively . Correct option is A) A) [M⁻³L⁻²T⁴Q⁴] 1