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How many neutrons does helium have?

Helium is produced in the sun, hence the name from the Greek sun god Helios. Together with hydrogen, helium is one of the most common elements in the universe. Hydrogen is the simplest atom in its structure: it has only one proton, can have one electron and also one neutron. Helium is one step up in complexity, having two protons and two neutrons. Helium is an inert gas, which means that its electrons do not enter combinations with electrons of atoms of different elements or other helium atoms. Two helium atoms are attracted to each other only due to the force of electrical field that is creat..

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What is the difference between power and energy?

Some of the different forms of energy include: elastic, light, sound, electromagnetic, gravitational, thermal, potential and kinetic energy. The most widely known form of power is electrical power, which is the rate at which electrical energy is transmitted by a closed circuit. Other forms of power may include optical power and human power.Energy can be converted from one form into another. For example, a battery produces electrical energy after converting it form chemical energy. The process of chemical explosion converts chemical energy into thermal and kinetic energy. Power cannot be transf..

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What is a low IQ score?

A person of average or normal intelligence is in the 90 to 109 IQ range. Superior intelligence is within the IQ range of 110 to 119. Very superior intelligence falls on the IQ scale at 120 to 140. A genius is a person who scores over 140. A full 50 percent of people who take IQ examinations fall within in the 90 to 109 range.

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What is the formula for copper(II) sulfate?

When copper forms a compound with the oxidation state +1, its molecular formula is different. The atomic number of copper is 29 and its electron configuration is 1s22s2 2p63s2 3p6 3d104s1 or 2, 8, 18, 1 electrons per shell. The electrons in the 3d104s1 are involved in bond formation, so copper has two oxidation states. Copper is a good conductor of electricity and melts at 1984.32 degrees Fahrenheit.

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How do viruses replicate?

Viruses either stay inside of the body or organs that they infect, or they spread to other people, according to the University of Rochester Medical Center. All viruses need a host cell in order to begin reproducing. Viruses can eventually interfere with the host cell's normal processes and explode out of it, which usually kills the host cell and leads to illness.\nThe University of Rochester Medical Center also notes that while some viruses actively reproduce, others can lie dormant in the body. In such cases, the virus harmlessly rests inside of the host cell and does not reproduce. This..

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What element has 12 protons when it is neutral?

Protons determine the elemental identity of an atom. If one removes or adds protons to an atom, it changes identity. For example, if one removed a proton from an atom of magnesium, it would then be a sodium atom. The number of protons in an element's atom is displayed in the upper left corner of the cells in most periodic tables; it is called the atomic number. Protons are positively charged. The other major parts of the atom are negatively charged electrons and uncharged neutrons. Atoms with fewer or more electrons than the atomic number are positively and negatively charged, respectivel..

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When is summer in Mexico?

While Mexico does not have a traditional four-season year, it does have a rainy season and a dry season. The dry season lasts from October to April and has little rainfall. The wet season lasts from April to October and has heavy rainfall. This trend is more profound in southern Mexico, where seasonal variations in temperature are minimal.

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How long do muscle cells live?

An accurate life span of a cell can be measured by applying the techniques of carbon-14 dating to the body's DNA. The research carried out by Dr. Jonas Frisen, a professor in stem cell research at the Karolinska Institute in Stockholm, showed that the majority of cells in the body are less than 10 years old, and he states he can measure their ages to an accuracy of two years. Skin cells are replaced roughly every two weeks, and adult liver cells have a life span of between 300 and 500 days.

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How can a person identify the various organs of the body?

Usually the location of the organ narrows down the list of possibilities for identification. For instance, the lungs are located in the chest area, while the intestines are located further down in the abdomen.\nSize must also be taken into consideration when identifying organs. Larger organs such as the brain and the heart are typically more easily identifiable. Smaller organs such as the gallbladder are harder to identify, and its location and function are needed to identify it. Shape can be used to identify organs as well; knowing that the kidneys are shaped like beans helps to identify them..

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What is the equation for elastic potential energy?

In the equation above, "P.E" is the elastic potential energy and expressed in joules, "X" is the displacement and "K" is the spring constant.\nThis equation is derived from Hooke’s Law, which states that force exerted to stretch a spring is directly proportional to its displacement. This is expressed by the formula F= -kx. TutorVista.com states that this energy formula is applied for problems where elasticity, elastic force and displacement are mentioned. In addition, Physics Classroom gives a special equation for springs that shows the amount of elastic potential energy and its relationship..

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