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The even numbers that can be rolled on a single die are 2,4, and 6 so the number of elements in the event space is 3. X={2,4,6}.
Those are called "even numbers".Those are called "even numbers".Those are called "even numbers".Those are called "even numbers".
The "median" is the "number in the middle", if you sort the numbers. If (as here) the set has an even number of elements, you sort them, and then take the average (arithmetic mean) of the two numbers in the middle - in this example, the 5th and 6th number.
10 is perfect because it is even
No even numbers add up to 9. The sum of even numbers is always an even number.
Oddo-Harkins rule Rule stating that the cosmic abundance of elements with an even atomic number is greater than that of adjacent elements with an odd atomic number. Consequently, a graph plotting relative atomic abundance against increasing atomic number (Z) displays a 'toothed' curve, rather than a smooth line. The reason for this is connected with processes such as helium burning (see nucleosynthesis). 42He is a basic building block, and so additions produce even numbers, e.g. 42He + 42He → 84Be;84Be + 42He → 126C. AILSA ALLABY and MICHAEL ALLABY. "Oddo-Harkins rule." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 21 Mar. 2009 .
the bigger the mass of an element, the higher its atomic number.
Electrons
Mendeleev's Periodic Table was different from Moseley's in that Mendeleev arranged the elements inÊthe table according to atomic masses while Mosley's periodic table was arranged accordingÊto atomic numbers that were increasing.ÊÊThe modern periodic table used today is based on the Moseley model.
element symbols, atomic number and atomic mass, or even color on some tables.
Hydrogen is the lightest of all elements. According to the Periodic Table, its atomic weight is 1.00794 u, even lighter than helium.
Atomic number (protons) and atomic mass (not to be confused with atomic weight, even if the difference is slight)
I don't know where you got the notion that elements of odd atomic numbers have two isotopes, but we don't have to look far for a counterexample: hydrogen... atomic number 1... has not one, not two, but THREE isotopes that exist for meaningful lengths of time. If you mean STABLE isotopes, then we have to go a bit further: the first four elements of odd atomic number (hydrogen, lithium, boron, nitrogen) do in fact have two stable isotopes. However, at the fifth we find our counterexample: fluorine (atomic number 9) has only one stable isotope, fluorine-19. Furthermore, helium (atomic number 2) ALSO has two stable isotopes, so we can't even invert the original question and ask why EVEN atomic number elements DO NOT have two isotopes. The question is therefore meaningless, as it's asking for an explanation of something that does not, in fact, actually happen.
Hydrogen is the lightest of all elements. According to the Periodic Table, its atomic weight is 1.00794 u, even lighter than helium.
Yes, atoms of different elements can have the same mass number if they contain different numbers of protons and neutrons. Isotopes of different elements with different atomic number can have the same mass number.
Zero group elements are considered monoatomic because they consist of single atoms that do not bond with each other. In a group with zero elements, there are no interactions or combinations possible between atoms, leading to monoatomic nature.
No they are all different and even some atoms of the same element have different weights