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Oh, dude, it's like this - elements with even atomic numbers are more abundant because they have more stable configurations due to their filled electron shells. It's like they're the cool kids at the party who don't need to invite anyone else to feel complete. So yeah, that's why they're just hanging out, being all chill and abundant.
What else can I help you with?
Why could you use clues about atomic mass to place elements even though the table is now based on atomic number?
the bigger the mass of an element, the higher its atomic number.
What elements have such small masses that they are not even considered when atomic masses are calculated?
Electrons
What elements are out of order in terms of the atomic mass?
In the periodic table, elements are generally arranged by increasing atomic number, but some are out of order based on atomic mass due to isotopes and electron configurations. Notably, elements like potassium (K) and argon (Ar) are examples where potassium (atomic mass ~39.1) appears before argon (atomic mass ~39.9), even though argon has a higher atomic mass. This occurs because the periodic table prioritizes the atomic number (number of protons) over atomic mass when ordering elements. Other examples include isotopes and the placement of certain transition metals.
Why is the atomic mass not a nice even number?
Because most elements that have at least one isotope stable against radioactive decay have more than one such isotope. The individual isotopes have integer mass numbers, but the naturally occurring abundances of the various isotopes do not usually have any integral ratios to one another, and the atomic mass is a weighted average of the isotope masses.
What are two atoms that are heavier than carbon?
Two atoms that are heavier than carbon are nitrogen and oxygen. Nitrogen has an atomic number of 7 and a higher atomic mass than carbon, while oxygen has an atomic number of 8 and is even heavier than nitrogen.
Why do elements of even atomic numbers are more abundant than that of odd numbers?
Elements with even atomic numbers are more abundant than those with odd atomic numbers because of nuclear stability. Elements with even atomic numbers have equal numbers of protons and neutrons, resulting in more stable nuclei due to pairing effects. This stability makes it easier for elements with even atomic numbers to be formed through various nuclear processes, leading to their higher abundance compared to elements with odd atomic numbers.
Why could you use clues about atomic mass to place elements even though the table is now based on atomic number?
the bigger the mass of an element, the higher its atomic number.
What elements have such small masses that they are not even considered when atomic masses are calculated?
Electrons
How does mendeleevs periodic table differ from moselys periodic table?
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.
How can specific elements be identified in the periodic chart?
element symbols, atomic number and atomic mass, or even color on some tables.
What element is the lightest of the elements?
Hydrogen is the lightest of all elements. According to the Periodic Table, its atomic weight is 1.00794 u, even lighter than helium.
Can an atom of two different elements have the same mass number?
Yes. The mass number is basic to the different elements, even more useful than the atomic number. (Unless it is an isotope. Isotopes have a different amount of neutrons than the basic element atom which makes a difference in mass number too. So, a difference in mass numbers doesn't always mean it is a different element.)
What is the name of the two numbers assigned to every element on the periodic table?
Atomic number (protons) and atomic mass (not to be confused with atomic weight, even if the difference is slight)
Why odd atomic number elements have 2 isotopes?
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.
Is the lightest of all the elements?
Hydrogen is the lightest of all elements. According to the Periodic Table, its atomic weight is 1.00794 u, even lighter than helium.
Do all elements have the same atomic weight?
No they are all different and even some atoms of the same element have different weights
How atomic mass related isotope?
It isn't, as such. Isotopes of the same element have different numbers of neutrons, and neutrons have a mas of one Atomic Mass unit (amu). So isotopes have different atomic masses, but being told the number of neutrons any isotope has, will not enable you to say what element or atomic mass it had, unless you remembered the details for every single isotope. Even then different elements can have the same number of neutrons. Isotopes do get named after their atomic mass however - uranaium 235 has an atomic mass of 235, for instance.
