The atomic masses of most elements are not whole numbers because they take into account the average mass of all the isotopes of that element, which have different masses due to varying numbers of neutrons. This results in a weighted average that is not a whole number.
In modern periodic tables, they arent; in order to find the number of neutrons in an atom you must subtract the atomic number (the number of protons) from the atomic mass (rounded to the nearest whole number). In older ones (from the 1930s), neutrons are listed as Element 0, but outside of very extreme environments (specifically, the core of a neutron star), that element simply does not exist, so it's no longer on the table.
To find the number of neutrons in an atom, subtract the atomic number (number of protons) from the atomic mass number (rounded to the nearest whole number). The atomic mass is generally provided in the periodic table or can be calculated as the sum of protons and neutrons.
They have different numbers of valance electrons...
Groups 14 and 15 on the Periodic Table feature elements which are metals, non-metals, and metalloids.
elements. everything else will decompose under the right conditions. however i believe you are asking about what can be composted in a compost heap, arent you? lol styrofoam take 1000 years to decompose; i wouldn't consider that a realistic decomposition time plastic (polymers) never biodegrade it just breaks into smaller pieces why wouldnt you just answer the question properly if you know what he meant lol, elements DO break down too and form isotopes or simply vanish into EM energy (half-lives)
In modern periodic tables, they arent; in order to find the number of neutrons in an atom you must subtract the atomic number (the number of protons) from the atomic mass (rounded to the nearest whole number). In older ones (from the 1930s), neutrons are listed as Element 0, but outside of very extreme environments (specifically, the core of a neutron star), that element simply does not exist, so it's no longer on the table.
if your numbers arent whole numbers then multiply them out until they are whole numbers that are easier to work with.
sorry to burst your bubble but......you just arent
ther usually arent numbers on leafs look on jerseys 4 numbers
Because it is intended to represent all known elements, not only those which exist in nature.
measure it with a ruler if there arent any numbers...
Because the elements in the air arent bonded chemically, they are just literally mix together.
nope. 11 dont equal 89. those numbers arent close at all duhhh
Whole numbers are 1,2,3,4..etc frations decimals and other numbers arent. Whole numbers include 0, counting numbers do not. Counting Numbers are also sometimes referred to as Natural Numbers. But the above answer is correct in that none of these sets: Counting, Whole and Integers include fractions or decimals.
To find the number of neutrons in an atom, subtract the atomic number (number of protons) from the atomic mass number (rounded to the nearest whole number). The atomic mass is generally provided in the periodic table or can be calculated as the sum of protons and neutrons.
Why arent plastic degradble
All noble gases are unreactive at S.T.P. However at high temperature and pressure, xenon and krypton will react with electronegative elements such as flourine and oxygen to form fluorides and oxyfluorides.