Chemistry

A:

Magnesium contains 12 protons. The number of protons of an element determines the atomic number on the periodic chart. The atomic number, or number of protons, is located in the top left corner of the element box, while the atomic weight is located underneath the element's symbol or name.

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  • Why was the pencil invented?

    Q: Why was the pencil invented?

    A: Although no documents state the motivation for the pencil's invention, it was likely first created as an alternative to pens. According to Pencils.com, the first known pencils were developed shortly after the discovery of a graphite deposit in Borrowdale, England, in 1564.
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  • What are the chemical properties of methane?

    Q: What are the chemical properties of methane?

    A: Methane is lighter than air and has a specific gravity of 0.554. Methane’s chemical formula is CH4. It is a colorless and odorless gas that is produced abundantly in nature.
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  • What are examples of mineral salts?

    Q: What are examples of mineral salts?

    A: Examples of mineral salts include sodium, calcium, ammonium phosphate, potassium, magnesium, chlorine, sulphur and phosphorus. Mineral salts are naturally occurring inorganic substances that are extracted from below the ground surface.
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  • What is barium phosphate used for?

    Q: What is barium phosphate used for?

    A: Barium phosphate is used to replicate lead contamination in soil without the accompanying lead toxicity. Because of its lack of toxicity, barium phosphate can be utilized in soil as remediation of metal.
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  • What is gold made of?

    Q: What is gold made of?

    A: Because gold is an element, a lump of pure gold contains nothing but gold atoms. Because pure gold is very soft and easily marred, it is often alloyed with other metals to make jewelry, coins and other precious objects.
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  • Who is the father of chemistry?

    Q: Who is the father of chemistry?

    A: While "father of chemistry" is, of course, subjective, one individual with a claim to the title is Dimitri Mendeleev. Born in Siberia in 1834, Mendeleev devised a predictive model for chemistry known as the periodic table. This model was validated when it successfully predicted the properties of then-unknown elements.
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  • What did Louis Pasteur do?

    Q: What did Louis Pasteur do?

    A: Louis Pasteur was a scientist who developed important vaccines and came up with the process of pasteurization for foods. He is credited with discoveries that laid the foundation for the study of microbiology and modern medicine.
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  • What are examples of alkaline substances?

    Q: What are examples of alkaline substances?

    A: Lye, baking soda and ammonia are examples of common alkaline substances. The word alkaline describes a water-based solution with a pH above 7.0.
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  • What does "alchemist" mean?

    Q: What does "alchemist" mean?

    A: An alchemist is someone who practices alchemy. Alchemy is a form of science dating back to medieval times that concentrates on chemical science and speculative philosophy. It is also used to explain mysterious transformations.
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  • How does solar energy work?

    Q: How does solar energy work?

    A: Solar energy emerges when light energy from the sun strikes a silicon solar panel to produce an electrical current. The silicon in the solar panels can transform light energy into electricity because the movement of electrons in the silicon crystal generates electrical energy.
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  • Where is hydrogen found in nature?

    Q: Where is hydrogen found in nature?

    A: As its name implies, hydrogen was first observed in water. Water consists of one oxygen atom bonded with two atoms of hydrogen. The abundance of water on Earth makes it the most common source of hydrogen on the planet. Pure hydrogen is rare on Earth, however, due to its propensity to react in the presence of oxygen and precipitate out as water vapor.
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  • Does the viscosity of a liquid affect its boiling point?

    Q: Does the viscosity of a liquid affect its boiling point?

    A: Most often, thicker liquids take longer to boil. Viscosity and boiling point are both physical properties that are determined by intermolecular forces. Although viscosity and boiling point do not directly affect each other, there is a correlation based on the strength of these intermolecular forces.
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  • Why does sugar dissolve faster in hot tea than in iced tea?

    Q: Why does sugar dissolve faster in hot tea than in iced tea?

    A: Sugar dissolves more quickly in hot tea than in iced tea because the solubility of solutes in solvents generally increases with an increase in temperature, according to Rutgers University. The heat provides energy to break the molecular bonds in the solid, causing it to dissolve faster.
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  • What things are made out of copper?

    Q: What things are made out of copper?

    A: Things that are made of copper include alloys, pipes, wires, coins, electronics and poisons. It is also a key element in creating bronze and brass.
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  • At what temperature does frost form?

    Q: At what temperature does frost form?

    A: Frost forms when the temperature drops below 32 degrees Fahrenheit. In order for frost to form, other conditions have to be present as well.
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  • Is distilled water the same as sterile water?

    Q: Is distilled water the same as sterile water?

    A: Sterile and distilled water are both essentially pure H2O, but each is used for different purposes. Distilled water is distributed for use in laboratories and for ordinary consumption. Sterile water is used in the medical community as a wound cleanser or an intravenous fluid.
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  • Where can sodium be found?

    Q: Where can sodium be found?

    A: While sodium is one of the most abundant elements in the crust of the Earth, About.com indicates it never exists in its elemental form. It is highly reactive and forms many compounds, including sodium chloride, or table salt. The most common form of sodium chloride on the Earth is halite, a mineral that miners remove from large mines. The rock salt from these mines remains from the evaporation of oceans.
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  • What happens when oxygen reacts with copper?

    Q: What happens when oxygen reacts with copper?

    A: The combination of oxygen and copper produces the substance called copper oxide. The formation of copper oxide requires a specific formula; the creation of this element ultimately produces a gas that resides in the atmosphere.
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  • What is the boiling point of oil?

    Q: What is the boiling point of oil?

    A: Oils used in food preparation have a range of boiling points, from about 375 F to about 510 F. The boiling point of oil depends upon the specific type of oil that is being heated as well as its specific purity. Crude oil subjected to refining involves a spectrum of different boiling points to extract the various elements comprising it.
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  • What is the smallest subatomic particle?

    Q: What is the smallest subatomic particle?

    A: The smallest subatomic particle is the quark. Quarks make up larger subatomic particles called hadrons, which include baryons and mesons. Three quarks make up composite particles called baryons, and the combination of a quark and an antiquark comprise a meson.
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  • Why are metals shiny?

    Q: Why are metals shiny?

    A: Metals are shiny because metals contain free electrons that vibrate when they come in contact with light. When the electrons vibrate, they produce their own light. This is reflected back and is what creates the shiny, lustrous appearance of metal.
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