# What is meant by magic number?

In nuclear physics, a magic number is a number of nucleons (either protons or neutrons, separately) such that they are arranged into complete shells within the atomic nucleus. As a result, atomic nuclei with a ‘magic’ number of protons or neutrons are much more stable than other nuclei.

## What is magic number example?

Magic Number in Mathematics For example, 325 is a magic number because the sum of its digits (3+2+5) is 10, and again sum up the resultant (1+0), we get a single digit (1) as the result. Hence, the number 325 is a magic number. Some other magic numbers are 1234, 226, 10, 1, 37, 46, 55, 73, etc.

## What is magic number class 11?

Solution : The numbers 2, 8, 8, 18, 18, 32 are known as magic numbers. It is because of the fact that the elements which occur after these intervals have similar properties. For example, atomic number of Li is 3. If we add 8 (magic number) to 3, then we will get atomic number 11 which stands for sodium.

## Why are magic numbers so called?

It has been found that the nuclei with proton number or neutron number equal to certain numbers 2,8,20,28,50,82 and 126 behave in a different manner when compared to other nuclei having neighboring values of Z or N. Hence these numbers are known as magic numbers.

## How do you find a magic number?

1. Take the total number of games, e.g., 162.
2. Subtract the total wins of the first team, e.g., 55.
3. Subtract the losses of the second team, e.g., 57.
4. Add 1 to the result and you have your first team’s magic number, i.e., 51.

## Is 7 a magic number?

There are many theories for this, among which, that seven (like three, another sacred number) is a prime number, indivisible; that our daily lives are organized around a seven-day week; and that seven is the limit to the amount of information we can process and remember at one time.

## Why is 9 a magic number?

The number 9 is revered in Hinduism and considered a complete, perfected and divine number because it represents the end of a cycle in the decimal system, which originated from the Indian subcontinent as early as 3000 BC.

## Why is 8 a magic number?

The number 8 is represented more than most numbers when analyzing people in positions of power or those with excessive wealth. The power and strength associated with number 8 are said to be feminine energy which can give you the strength to achieve your life’s goals.

## Why is 3 the magic number?

The ancient Greek philosopher, Pythagoras, postulated that the meaning behind numbers was deeply significant. In their eyes the number 3 was considered as the perfect number, the number of harmony, wisdom and understanding.

## What are the properties of magic numbers?

magic number, in physics, in the shell models of both atomic and nuclear structure, any of a series of numbers that connote stable structure. The magic numbers for atoms are 2, 10, 18, 36, 54, and 86, corresponding to the total number of electrons in filled electron shells.

## What are periodic properties and magic numbers?

Magic Numbers – When the elements are arranged in the order of increasing atomic number it is observed that the elements with similar properties recur after intervals of either 2 or 8 or 18 or 32 elements. These numbers2 8 18 32 are called magic numbers.

## IS 58 is a magic number?

However, due to the different nature of the potentials in atomic and nuclear domain, the two sets of magic numbers do not exactly coincide, namely, the magic numbers in the Na-clusters are 2, 8, 20, 40, 58, 92… [4,5] whereas, the nuclear magic numbers are 2, 8, 20, 28, 50, 82…

## Why is magic number stable?

Based off the belt of stability: Stable, because this Ca isotope has 20 neutrons, which is on of the magic numbers. Unstable, because there is an odd number (25 and 29) of protons and neutrons.

## Why are there no magic numbers that are odd?

It is found that nuclei with even numbers of protons and neutrons are more stable than those with odd numbers. Nuclei that have both neutron numbers and proton numbers equal to one of the magic numbers can be called “doubly magic” and are found to be particularly stable.

## Why is 1729 a magic number?

Discovered by mathemagician Srinivas Ramanujan, 1729 is said to be the magic number because it is the sole number which can be expressed as the sum of the cubes of two different sets of numbers. Ramanujanâ€™s conclusions are summed up as under: 1) 10 3 + 9 3 = 1729 and 2) 12 3 + 1 3 = 1729.

## How do you use magic number?

A magic number is a numeric literal that is used in the code without any explanation of its meaning. The use of magic numbers makes programs less readable and hence more difficult to maintain and update. Example: int salary = 20000 * workedhours; // what is the meaning of 20000?

## Is 0 a magic number?

0, 1, -1, 2 These are not generally considered magic numbers, and it’s ok to have them in your code. However, it’s often possible to add more context to explain why you’re using these numbers.

## Why is 137 a magic number?

To physicists, 137 is the approximate denominator of the fine-structure constant (1/137.03599913), the measure of the strength of the electromagnetic force that controls how charged elementary particles such as the electron and muon interact with photons of light, according to the National Institute of Standards and …

## Why 17 is a lucky number?

Number 17 symbolises Dharma (Sun – 1) and esoteric spiritual knowledge (Ketu – 7). The combination of these Numbers is deemed auspicious and is known for blessing one with success. However, when added (1+7), 17 mirrors the qualities of Number 8 ruled by Shani (Saturn).

## Why is 4 a lucky number?

While in the musical scale, Four is pronounced Fa, the same sound with 发 (fortune) in Chinese. Therefore some people regard 4 as the propitious and lucky number in this case and there is an old saying in Chinese – 四季发财 (be wealthy all the year round).

## Why is 9 so special?

As the final numeral, the number nine holds special rank. It is associated with forgiveness, compassion and success on the positive side as well as arrogance and self-righteousness on the negative, according to numerologists. Though usually , numerologists do have a famous predecessor to look to.

## What is the secret of number 9?

When any number is multiplied by nine, if the individual digits in the resulting product are added, they will always total nine as long as you keep summing the digits produced at each step until you get a one-digit number. That will always be nine.

## Why is the number 9 lucky?

The number nine is often associated with a divine connotation in the mystical thought and religions across the globe from ancient times. There is both, negativity and positivity in this mysterious nine! Not to talk of the numeral 9, which is often cited as a ‘lucky number’ for many these days!

## Does number 8 mean infinity?

In numerology, number 8 is the eighth number in sequence of the root numbers, following number 1, number 2, number 3, number 4, number 5, number 6, and number 7. Number 8 is unique in that it’s not only a symbol of infinity, but it’s associated with financial stability, power, prosperity, and karma.

## Is 7 a good number?

In many cultures around the world, seven is considered a lucky number. This probably explains the affinity many people feel for the number seven. Some scientists and mathematicians also believe there are some interesting properties of the number itself that also make it alluring.