Question
According to Mendeleev’s Periodic law, the elements
were arranged in the periodic table in the order of…………...?Solution
The Mendeleev's periodic law is an arrangement of elements in increasing order of their atomic masses as Mendeleev's periodic law states that, the physical and chemical properties of elements are a periodic function of their atomic masses.
- Two numbers have a sum of 112. If their LCM is 420 and HCF is 6, determine the smaller number.
If a, 1, b are in arithmetic progression and 1, a, b are in geometric progression, then a and b are respectively equate to _______ (where a ≠b).
Raj scored 140 marks in a test getting 3 marks for each right answer and losing 1 mark for each wrong answer, had 4 marks been awarded for each correct...
Find the value of 6 + 66 + 666 + 6666 +hellip;hellip;hellip;hellip;.. + n terms.
1. `(2)/(3) ((10 xx (10^(n)- 1))/9 - n)`
2.
- Find the median of the following observations:
120, 125, 115, 130, 140, 135, 145 Find the greatest 3-digit number which is exactly divisible by 7, 8 and 9.
How many unique five-digit numbers can be created using the digits 0, 1, 5, 6, 7, and 8, without repeating any digit?
- When is the expression 16x - 4x² - 48 greater than zero?
A = (7/3) × B and C = (1/14) × A. If (A + B + C) = 360, then determine the value of (10C – B).
Nine numbers are arranged in decreasing order. The average of the first eight numbers is 50, and the average of the last eight numbers is 45. What is th...
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