How can I find out the order of elements from lightest to heaviest just by looking at the periodic table?
336969
You answered your own question. They're arranged in order of weight. Okay, they're not in perfect order, but nearly every periodic table lists the ordinal (1,2,3,4...etc) atomic weight right on it.
735240
Your question lacks clarity.  Is the question about an element on the periodic table? If it is - and once again, you don't specify - then a likely answer is "Thorium" named after Thor, the greek god of thunder.  I don't know, you didn't actually give any context with the question.  I suggest going to www.wikipedia.com for help with anything, though.   \n\nThe second question, about the order of the planets by rotation - do you have a science book?  That would help you more than the internet because the answers will all be there.  Open the book, go to the chapter(s) about planets, take out a piece of paper, and write down the name of the planet next to the length of the respective planet's day.  When you have all of the written down, you will be able to order it.  \n\nHere is some extra help for you for a question you did not ask but clearly need answered:\n\n"Your" is possessive - "Your eyes are like deep buckets of molasses" \n\n"You're" is an abbreviation of "You are".
266069
Every atom has two unique numbers: Atomic Number (Z) and mass number (A). Atomic number Z represents the number of protons in the nucleus of an atom. Mass number A represents the number of neutrons and protons in the nucleus of an atom. When atoms are expressed on a periodic table, they are written with a number on the top and a number on the bottom. Z is written on the top and A is written on the bottom. Also when elements are represented with the name and a number on the upper lefthand side corner. This number represents the electrical charge of the atom. This is the number that tells us if the atom gained or gave away electrons.\n\nTo calculate the number of protons: Simply just look at the atomic number and it is the number of protons. For example Number of protons in a sodium atom is 11.(Z=11)\n\nTo calculate the number of electrons: Subtract electrical charge of the atom from the atomic number. For example Na+1 tells us that sodium atom gave an electron away. So 11-1=10 electrons present.\n\nBut the number of electrons is equal to the number of protons when the atom is not charged.\n\nTo calculate the number of neutrons: Subtract the atomic number from the mass number. For example, to find the number of neutrons in the nucleus of a sodium atom 23-11=12 neutrons.
1054743
A major research institution has recently announced the discovery of the heaviest element yet known to science. This new element has been tentatively named "Administratium." Administratium has 1 neutron, 12 assistant neutrons, 75 deputy neutrons, and 111 assistant deputy neutrons, giving it an atomic mass of 312.\n\nLightest would be Hydrogen.\n\nelements consist of atoms which have protons, neutrons and electrons.
149440
http://www.chemicalelements.com/elements/k.html\n\nhttp://www-spof.gsfc.nasa.gov/stargaze/Q6.htm
1113655
Investigate the origins of the periodic table.
290665
3.45×10^−25 kg = Lead-208 atom, the heaviest stable isotope known\n\ncheck here http://en.wikipedia.org/wiki/Orders_of_magnitude_(mass) good luck
929841
The best bet is to go to a chemistry website and see if there is an explanation of chemical formulas. Also, you should be able to download the periodic table, showing all the elements.
1114092
All you really need to know is what column the element is in.  The first column from the left is +1 and the second column from the left is +2.  Here you have to remember to skip over to column 13, which is +3.  14 is + or -4, 15 is -3, 16 is -2, 17 is -1, and 18 is 0.  Columns 3-12 are metals, and there are usually several small numbers above the symbol on a good table.  They will tell you the charge of the element.  If there are more than one for the metal, the bold one is the most common.\n\nHope this helps and isn't too confusing!
47846
Look up the atomic mass (sometimes called atomic weight) on the periodic table, and subtract the atomic number from it.  The atomic mass is (practically) equal to the total number of protons and neutrons, and the atomic number is equal to the number of protons.  When you subtract atomic number from atomic mass your subtracting the number of protons from the total number of protons and neutrons, which leaves you with just neutrons.
546865
First, it seems to have only 2 isotopes.  \n\nYou need to take each mass and multiply by its percentage.  Then add the two resulting numbers together.  You then have the weighted average mass for the element, or average atomic mass.  This weighted average atomic mass is the one reported on the periodic table of elements.\n\n35 x 40%\n+\n37 x 60%
622404
Element Zinc - Zn\nComprehensive data on the chemical element Zinc is provided on this page; including scores of properties, element names in many languages, most known nuclides of Zinc. For many elements information on common compounds of is now provided as well. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one studies. Using the "Periodic Table of Elements Quick Navigation" graphic at the bottom of the sidebar menu, one can quickly jump from chemical element to chemical element.
867714
Indeed, it looks as if everyone is correct. You do round to the nearest whole number. \n\nThis gives you the most commonly occurring isotope for that element. In this case O-16, which gives you the total number of neutrons + protons. To get Neutrons subtract the Atomic No. from the AMU.\n\nOxygen has other isotopes (same element with different numbers of neutrons), thus different weights. Ex: O-15, O-14, O-17, etc.\n\nGet an "A".
907877
check this site out\n\nhttp://www.chemicalelements.com/elements/al.html
989104
Im pretty sure that the atomic numbers go in order on the periodic table.
1138448
Look on a periodic table.\n\nIt should be listed below the atomic number as a decimal value.  The mass number is an average mass (in atomic mass units) of an element, based on different isotopes.  It equals the number of protons + the number of neutrons in the nucleus.
8946
You take the difference between the mass number and the atomic number to determine your neutron count.. at least that is what is stated in my Chemistry book.  Hope this info helped!