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The whole number, the one at the top, above the element's symbol in the element box, is the atomic number. The atomic number is the number of protons per atom in that particular element. The bottom number, that is always a decimal, is the Atomic Mass.
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What does the mass number on the periodic table mean?
The mass number is the combined number of protons and neutrons in the nucleus of the particular element you are looking at. NOTE: (don't be confused by the periodic table) Different elements have isotopes with varying mass numbers, so the mass number displayed on a periodic table is the ratio of those isotopic mass numbers in any given sample of the element your examining. This ratio is often confused with with the mass number of the element when it is displayed on periodic tables, it is actually the relative atomic mass. You can tell if a number is the mass number or a relative atomic mass by whether or not it is a whole number if it is then it's a mass number if it has decimal places out beside it then you're looking at relative atomic mass.
What is the general trend of atomic radius?
When looking at a periodic table, atomic radius increases from top to bottom, and decreases from left to right. The bottom left corner is the largest, while the top right corner is the smallest radius.
Is white rice a whole grain or a non whole grain?
usually whole grain but you do get different types of rice
Where is data held in a computer system?
The data is held on the hard drive in a computer system. The data is changed into single numbers and then recorded by the hardware on the computer before storage.
How many significant digits are in the measurement 589.040 Newtons?
The answer is 3. Significant figures in a whole numbers are integers on the left of the decimal point beginning with the first non-zero number. That's confusing so let me use some examples: 589. has 3 because there are no zeros to the left of the decimal and 3 numbers 5089. has 4 because there are no ending zeros and 4 numbers. 5890. has 3 because only the the zero is next to the decimal. 58900. also has 3.
Why don27t elements in the periodic table have whole numbers for their atomic masses?
Because the masses of protons, neutrons and electrons are not whole numbers.
What number is the whole number found in the periodic table?
There are two numbers that are included in every element's block on every periodic table. The whole number, which can range from 1 - 118 is the atomic number of that element. The atomic number is the number of protons in the nuclei of the atoms of that element. The second number is the atomic weight and is never a whole number, except for the artificially prepared elements, and then it is a whole number written inside parentheses.There may be other numbers listed as well, depending on the periodic table. All periodic tables have a key as to what everything inside each block represents.
Why the atomic mass numbers listed for elements on the Periodic Table are not whole numbers.?
Why are atomic masses of elements not generally whole numbers? The atomic masses listed on the periodic table are a weighted AVERAGE of an element'sisotopes. ... An element's atomic number is the number of protons in its nucleus. Number of protons specifies atom type.
Why the mass numbers on the periodic table of elements are rarely whole numbers?
Elements also possess isotopes. So their average atomic mass is rarely whole number.
What increases in the periodic table?
From left to right, then top to bottom we have increasing numbers of protons (and in whole atoms also electrons).
Why elements don't have whole numbers?
do you mean the why is the average atomic mass not a whole number? because if that is your question, then the answer is that each element has multipal isotopes and the mass you see on the periodic table is the average of all the isotopes together. So there has to be a decimal on the periodic table of elements
Is the whole periodic table made out of elements?
Yes it is.
What is the only element in the periodic table of group 1?
Actually group 1 is ALL elements and so is the whole periodic table.
Why is the modern periodic table useful?
The Modern Periodic Table is useful because using the symbols are much easier than writing out the whole word.
How do you find the atomic mass and the atomic number?
The atomic number is the whole # on the periodic table or the # of protons in an atom. The atomic mass is the # that is not the whole # on the periodic table, or you can multiply the mass of the isotope by its abundance and add the answers together.
Why do we use fractions?
the wat to represent quanites that we cant represent with whole numbers.
Why are the elements 94 through 110 in the periodic table whole numbers?
1. All the atomic numbers are whole numbers. 2. If you think to atomic weight of heavy radioactive elements (atomic numbers from 93 to 118) is a rule of IUPAC to indicate in square parenthesis, [], the atomic mass of the most stable or known isotope.
