The number 75 is interesting because it is the atomic number of rhenium, a rare metal used in high-temperature superalloys. It is also a semiperfect number, meaning it is equal to the sum of some of its divisors, specifically 1, 3, 5, 15, 25, and 75. In Roman numerals, 75 is represented as LXXV. Additionally, 75 is a Harshad number, which is an integer that is divisible by the sum of its digits.
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You have to know the element with the mass number of 75. Then you would look it up on the periodic table to find the atomic number, which is the number of protons.
The element with 75 protons in period 6 is Rhenium (Re), which has an atomic number of 75.
75 can be multiplied by 1 and 75, 3 and 25, or 5 and 15 to equal 75.
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75 millimeters is equal to 0.75 decimeters. To convert millimeters to decimeters, you need to divide the number of millimeters by 100.