Elements and Compounds
Atoms and Atomic Structure
Periodic Table
Chemical Bonding
Acids and Bases
Math and Arithmetic
Science Experiments
Particle Physics
Organic Chemistry
Earth Sciences


This category encompasses all questions about the composition, structure, properties, and reactions of matter.

Asked in Chemistry, Periodic Table, Atoms and Atomic Structure

What type of element is a protactinium?

I'm not too bad at chemistry, but one thing I can't wrap my head around is how perfect the periodic table is. How is it that each element that we know is only one more proton than the last? How come it goes in PERFECT order instead of having a few elements with protons not perfectly linear to the periodic table?...

Asked in Science, Chemistry, Periodic Table

What is the fourth element of the periodic table of elements?

Beryllium (Be) See the Web Links and the Related Questions for more information. ...

Asked in Chemistry, Law & Legal Issues

What gas law applies to aerosol cans being stored in a cool place?

Don't really know if this is what your asking but P1/T1= P2/T2 should show how the pressure varies with temperature (V is left out because it's constant since the gas is trapped in an aerosol can). As the temperature rises the pressure rises and if it gets too high then the can explodes, which is why it should be stored in a cool place. There's also PV=nRT might be kind of hard to find moles (n) though. the ideal gas law will...

Asked in Biology, Physics, Chemistry

Which science is the most complex chemistry or biology or physics?

Biology is the most complex because it deals with living organisms and number of known organisms is more than two and a half million while un-described species are estimated up-to 30 million . each organism is different from other and has its peculiarities . Chemistry deals with matter, with 92 natural element and nearly thirty synthetic elements . Number of organic molecules is quite large but much less as compared to species. ...

Asked in Chemistry, Civil Engineering, Construction, Metallurgy

What does Fe500 steel mean?

The abbreviation Fe stands for Ferrous material ie iron from which the reinforcement steel bars are manufactured. The reinforcement steel bars used in RCC (Reinforced Cement Concrete) are designated as Fe415 or Fe500 depending on their Yield Strength. (The numbers 415 and 500 tell about this Yield Strength in N/mm2 the bars are designed and manufactured to have.) As per IS : 1786 Yield Stress (also known as 0.2% proof stress) of Fe 500 is 500 N/mm2. So, Fe500 steel means the reinforcement steel rods...

Asked in Chemistry, Philippines

Who are some famous Filipino chemists and what are their contributions to the field of chemistry?

Filipino Chemists and their contributions Julian Banzon - experimented with the production of ethyl ester fuels from sugarcane and coconut and invented a means of extracting residual coconut oil by a chemical process rather than a physical process. A pioneer for alternative fuels ROM the 1930's and 40's. Francisco Quisumbing - invented Quink ink (currently used in Parker Pens) which is a quick drying ink that prevents the ink from clogging the pen. Ramon Barba - created crop flowering techniques using a potassium nitrate spray. Due...

Asked in Science, Physics, Chemistry, Chemical Bonding

Why does water have a high and specific heat capacity?

First, we need to know a little bit about water. Water is a polar molecule because oxygen bears partial negative charge and hydrogen bears partial positive charge. This results in extensive hydrogen bonding in water molecules between slightly negative oxygens and slightly positive hydrogens. Second, we need to remember that temperature is another way of saying the average kinetic energy of particles - the higher the temperature, the faster they move, in the case of gases and liquids, or vibrate, in the case of...

Asked in Chemistry, Elements and Compounds

How will you justify water is a compound?

See related questions. Water is made up of elements Hydrogen and Oxygen with the chemical formula: H2O. It can easily be disassociated with electrolysis into the elements Hydrogen (H2) and Oxygen (O2), and reformed with combustion. It has aspects of both covalent and ionic bonds. It is generally considered neutral, but can be a proton donor to act as a weak acid. H2O --> HO- + H+. It can also act as a weak base, being a proton acceptor. H2O + H+ --> H3O+. ...

Asked in Cleaning, Chemistry, Manicures and Pedicures

How do you remove nail polish stains from your carpet?

I'm a material researcher and I've reviewed this extensive answer. There are many inaccuracies and bad advice here, along with extremely effective and absolutely clear recommendations that should work very well. Nail polish is, for practical intents and purposes, a form of nitrocellulose lacquer. Nitrocellulose, the first plastic ever invented, is an excellent coating material for human cuticle, and that's why it's used in nail polish. But if it spills and gets on something unintended, it can make a difficult stain. To effectively remove...

Asked in Physics, Chemistry, Atoms and Atomic Structure

What is the temperature of a lighter flame?

The temperature of a Bic lighter flame is 1977 C or 3590.6 F.

Asked in Math and Arithmetic, Chemistry

What are negative ligands?

Any negatively charged species that is able to donate its lone pair to the metal is called a negative ligand. For example, Cl- , Br-, SO4-2, C2O4-2. The name of the ligand will end with O (i.e. sulphate will become sulphato, nitrite will become nitrito etc.) ...

Asked in Chemistry, Nuclear Physics

What is the definition for Radioactive Element?

A radioactive element is an element with an unstable nucleus, which radiates alpha, beta or gamma radiation and gets converted to a stable element ...

Asked in Chemistry, Acids and Bases, Metal and Alloys

What happens when dilute acids react with chemically active metals?

Hydrogen gas is evolved along with the formation of a salt. For example, when hydrochloric acid (HCl) is reacted with magnesium (Mg): 2 HCl + Mg --> MgCl2 + H2 ...

Asked in Chemistry

What organisms use energy from the sun or stored in chemical compounds to manufacture their own nutrients?

Producers are organisms that use energy from the sun or stored in chemical compounds to manufacture their own nutrients. ...

Asked in Chemistry, Science, Sports

Why is science defined as a product and a process?

This is because science is not just the information presented (the product), but also the way in which that information has been collected (the process). While scientific knowledge should be testable and falsifiable (according to Karl Popper), the way in which such information has been gathered is also important. Science should be unbiased and experiments should be repeatable by different individuals. There are different philosophers who argue on the way science proceeds. (see Popper, Kuhn, Lakatos and Feyerabend) ...

Asked in Chemistry

Does paper contain carbon?

Yes, paper is mostly cellulose, which is a compound of carbon, hydrogen, and oxygen. ...

Asked in Chemistry, Acids and Bases

What does A pH of 10 denote?

A pH of 10 is a base. Anything higher than 7 is a base and anything lower than 7 is an acid. 7 is neutral. ...

Asked in Chemistry, Organic Chemistry

What is the IUPAC for glucose?

On wikipedia, it says that the IUPAC name for glucose is 6-(hydroxymethyl)oxane-2,3,4,5-tetrol. ...

Asked in Chemistry

What are the names and uses of the various laboratory tools?

Laboratory Tools and Apparatuses Tools include beakers, microscopes, tweezers, hot plates, lasers, volt meters, test tubes, Erlenmeyer flasks, thermometers, test tube racks, Bunsen burners, crucibles, tripods and more. They are used to measure, observe and gather data for experiments, as well as to safely perform reactions and to heat things. More advanced laboratory equipment includes items such as spectrometers, centrifuges and chromatographs. Of utmost importance are these safety tools: Eye wash: In case materials get into your eyes, use this to rinse them out. Safety shower: In...

Asked in Nutrition, Chemistry

What is papad khar?

Papad khar is an Indian term for alkaline salt - sodium benzoate which is widely used as a food preservative known - E211. Alternatively you can use Sodium Carbonate and Sodium Bicarbonate in 2:1 ratio instead of Papad Khar ...

Asked in Chemistry, Biochemistry

What are the Biological properties of Water?

Water is a chemical substance with the chemical formula H2O. Its molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state, water vapor or steam. Water covers 70.9% of the Earth's surface,[1] and is vital for all known forms of life.[2] On Earth, it is found mostly in oceans and other large water bodies, with 1.6% of water below...

Asked in Chemistry, Organic Chemistry, Acids and Bases

Why para nitro phenol is more acidic than meta nitro phenol?

Para nitrophenol is more acidic than meta nitrophenol because the deprotonated cation for the para form is able to delocalize the positive charge over the ring AND the nitro group, whereas the meta form is only able to delocalize over the ring. Thus the para ion is more stable, so the products for an acid-base reaction are more favoured for the para than for the meta. ...

Asked in China and Chinese Territories, Chemistry

What is a product made from xylene?

Xylene is generally used as a solvent. It is often encountered as a mixture of three different isomers, (same composition different structure), which are generically dimethylbenzenes. Para-xylene (1, 4 dimethyl benzene) can be oxidised toterephthalicacid which is then used for manufacture of PET plastiic. Xylenes can be chlorinated to form disinfectants (PCMX). ...

Asked in Chemistry, Elements and Compounds

Name two compounds in unpolluted air?

Carbon Dioxide is present in unpolluted air. Methane (animals grazing literally fart this out) is also present and Nitrogen oxides formed when lighting strikes. The electrical discharge is high enough to cause oxygen and nitrogen to combine. It is basically a natural fertilizer In unpolluted air these compounds are present at levels of about 390 parts per million, 1.8 parts per million, and 1 part per billion respectively. The most abundant and most important compound in unpolluted air is ... water vapour -- present at...

Asked in Chemistry

What is waterline corrosion?

Waterline corrosion: when water is stored in a metallic tank, it is observed that the metal below the waterline gets corroded. It is because the water below the waterline is poorly oxygenated and acts as an anode. The metal above the waterline is highly oxygenated and acts as a cathode. Hence corrosion of metal below the waterline takes place. Any other questions skype me christianschulte6474 or email me at ...