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Finding compounds for the dynamic periodic table

Trying to finds compounds to create the molecule for an atom

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Posted on Sep 11, 2009

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SOURCE: i want ans..... of que?

Molar mass of C6H12O6 = 180.15588 g/mol

Posted on Jan 04, 2011

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SOURCE: i need walsh diagram of penta atomic molecule

v havent any idea like pentaatomic molecules

Posted on Mar 26, 2011

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How are protons organized ?

Atomic protons? The nucleus of the atom of each stable element has a certain number of protons, and except for hydrogen, also neutrons. These numbers are what differentiate the elements and give them properties, whether gaseous, metallic, alkaline, reactive or inert. Protons have a positive electrical charge.

The number of electrons will match the number of protons to give a stable atom a neutral net charge. An atom which loses or gains an electron or 2 is known as an ion. An atom which gains one or more neutrons is known as an isotope. However ions and isotopes still have their proper numbers of protons.

Ions will seek to attach to another particle so as to gain stability. Isotopes will decay over time, sometimes thousands of years.

All the elements are arranged in families or groups where chemical properties are comparable, in the Periodic Table of the Elements

Mar 27, 2015 | Edu-Science Optics

1 Answer

What is the atomic number of Eieinsteinium trioxide

The atomic number for that element is 99. You did not pick an easy one to do. That element is man made. If you are mixing it with an oxygen molecule to get o3 compunds you are looking at a pretty complex structure.

Dec 02, 2013 | Computers & Internet

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How many atoms of hyrdrogen gas in tow moles how

Hydrogen gas is a diatomic substance: Each molecule contains two hydrogen atoms.
A mole of hydrogen gas contains 6.02*10^23 hydrogen molecules, but since each molecule contains 2 hydrogen atom you have 2*6.02*10^23=?
The formula for nitric acid is HNO_3. It contains 5 atoms regardless of the elements
Now, 0.25 moles contain 0.25* 6.02*10^23 molecules oh nitric acid, ans since each molecule contains 5 atoms then 0.25 moles contain 0.25*5*6.02*10^23=? atoms
0.25*1*6.02*10^23 of hydrogen atoms, and the same number of nitrogen atoms and 0.25*3*6.02*10^23 oxygen atoms.

Oct 01, 2013 | Cars & Trucks

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How many grams of aluminum acetate contain 2.24 x 1022 atoms of hydrogen?

1 Look up the formula for the aluminum acetate.
2 Count the number of Hydrogen atoms per molecule: Call that nH.
3 Dividing 2.24*10^22 by nH you get the number of molecules of acetate.
4. Divide that number by Avogadro's Number to obtain the number of moles required.
5. Multiply the number of moles by the molecular mass of the aluminum acetate (look it up or use the periodic table to calculate it), you will get the mass of aluminum acetate that contains 2.24*10^22 hydrogen atoms.

Sep 14, 2011 | Texas Instruments TI-84 Plus Calculator

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What is matter?

Matter is a substance that has inertia and occupies physical space. According to modern physics, matter consists of various types of particles, each with mass and size.
The most familiar examples of material particles are the electron, the proton and the neutron. Combinations of these particles form atoms. There are more than 100 different kinds of atoms, each kind constituting a unique chemical element. A combination of atoms forms a molecule. Atoms and/or molecules can join together to form a compound.
Matter can exist in several states, also called phases. The three most common states are known as solid, liquid and gas. A single element or compound of matter might exist in more than one of the three states, depending on the temperature and pressure. Less familiar states of matter include plasma, foam and Bose-Einstein condensate. These states occur under special conditions.
Different kinds of matter can combine to form substances that may not resemble any of the original ingredients. For example, hydrogen (a gaseous element) and oxygen (another gaseous element) combine to form water (a liquid compound at room temperature). The process of such combination is called a chemical reaction. A chemical reaction involves interactions between the electrons of the atoms, but does not affect the nuclei of the atoms.

I hope you find it very helpful. Best regards.

Aug 16, 2011 | Apple QuickTime VR Authoring Studio 1.0

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After bonding atoms we are ask to name the resulting compounds in its common name and as well as its chemical name. so my question is, what is the difference between common names and chemical names? please...

Common name is the name what people call it, it usually gives you no idea as to what the chemical composition of the compound is. (eg: Common name for Sodium Chloride is Salt) whereas the chemical name is based on what the compound is made up of (A molecule of salt is made up of one atom of Sodium and one atom of chlorine. this can be understood from the chemical name, but not from the common name.)

Mar 08, 2011 | Computers & Internet

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What is the electron dot diagram for nitrogen

The electron-dot structure (also known as the "Lewis dot structure") for N is shown below:dubblea_6.jpg The red dots represent electrons that comprise the atom's 5 valence electrons. Recall that the valence (outermost) electrons are those that are involved in chemical reactions of bonding. The rule you should apply to drawing this electron dot structure is to first draw (or imagine) a rectangle around the atom's symbol, letting the rectangle represent the atom's core electrons (not shown), those within the atom's inner (s) shell. Then place one electron on each side. That leaves the remaining electron to be placed on one of the already occupied sides to give the electron pair.

It doesn't matter what side you place this 5th electron, because the final result is the pattern shown above, 3 single dots and one pair of dots, which neatly reveals the bonding power* of N (3) - and the existence of the one electron pair, which predicts special types of reactivity you will probably appreciate in more advanced topics of this element's behavior.

*The single electrons are more reactive than the electron pair, and will readily form bonds with other atoms, such as H. This allows you to predict that N and H atoms will combine to form NH3.

How do you know there are 5 valence electrons? For the answer, refer to the following partial image of the Periodic Table of the Elements I drew using Word and SnagIT software:
Notice the number-letter labels above each column ("group") of elements, for example "5A." The letter A indicates the groups of "representative" elements, the most common elements studied in general chemistry courses. The numbers before the "A" represents the number of valence electrons surrounding each element's atoms. For example, hydrogen has one valence electron, nitrogen has 5 valence electrons, and oxygen has 6 valence electrons.

Using the rules described above for drawing electron-dot structures, how many single dots and double dots should be drawn around H? Around O? Can you predict the bonding power of each of these atoms? What molecular compounds do you predict would be formed from the reaction of H and H? What molecular compound do you predict would form between combining H atoms and O?

Reactions tend to occur that cause the single electrons (dots) to pair up. This occurs because paired electrons are much more stable than single electrons. A strong driving force for a reaction is the going from a less stable state to a more stable state. Hydrogen atoms from H2 molecules (diatomic molecules). H and O atoms combine to form dihydrogen oxide, also known as water!

  • A very simple set of rules allows you to predict the electron dot structures of the representative elements.
  • The electron dot structures are very useful, because they can allow you to predict the bonding power of each representative element.
  • They are also useful in guiding your prediction of the compositions of molecules that can form during reactions between their atoms (that is, how many of each element in the molecule).
  • In more advanced topics you will also be able to use electron-dot structures to predict the shapes (or geometry) of molecules, including bond angles!
  • So, learning the skill of drawing electron-dot structures is very important to mastering chemistry!


Nov 04, 2010 | Scientific Explorer My First Chemistry Kit

1 Answer

How do I calculate this question with the fx-115es. Find the number of moles of nitrogen in 1.75 mol N2H4?

You have 1.75 moles of hydrazine or 1.75xNa molecules of the substance. Since each molecule of N2H4 contains 2 atoms of nitrogen 1.75Na molecules contain 2x1.75xNa atoms of nitrogen. The number of moles of nitrogen is 2x1.75xNa/Na, which leaves 2x1.75 or 3.5 moles.
Your answer: 1.75 mol of hydrazine contain 3.5 mol of nitrogen atoms.

Sep 23, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Difference between covalent and ionic compound

In general, the most common covalent compounds do not contain a metal as one of its constituent elements. So, with few exceptions to be mentioned momentarily, if you do not see a metal atom in a formula for a compound, it is probably the formula for a covalent compound. (An exception to this is butyl lithium, BuLi of the class of organometallic compounds, which have very little ionic character, even though they contain an ion.)

Most Ionic compounds contain at least one positively charged metal atom, such as NaCl. The metal is sodium as its positively charged ion, Na+. (There are exceptions to this rule. For example, NH4Cl, ammonium chloride, is an ionic compound, containing the ions, NH4+ and Cl-.)

Suggestion: Memorize the common elements and what ions they can form. Study atomic structure and quantum mechanics theory, the aufbau theory, the major trends of the periodic theory, which will give you a systematic way to estimate or predict the ions and the charges of many of the elements. Knowing the trends and patterns in the periodic table will allow you to easily recognize which elements are metals and which are nonmetals. This knowledge, combined with the rules given above in paragraphs one and two, will empower you to distinguish between covalent and ionic compounds, because you will be able to recognize when a compound contains metals or only nonmetals.

Aug 20, 2010 | Scientific Explorer My First Chemistry Kit

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