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Can the mass number of the atom ever be smaller than its atomic number?
Wiki User
∙ 11y ago
No. The atomic number only counts the number of protons or electrons in an atom, but the mass number counts at least the number of protons, sometimes the electrons and the number of neutrons if any. The closest they will get is being the same (Hydrogen with AN=1, MN=1), but the mass number will almost always be bigger than the atomic number.
Lyric Wintheiser
Wiki User
∙ 15y agoNo. The atomic number only counts the number of protons or electrons in an atom, but the mass number counts at least the number of protons, sometimes the electrons and the number of neutrons if any. The closest they will get is being the same (Hydrogen with AN=1, MN=1), but the mass number will almost always be bigger than the atomic number.
Wiki User
∙ 11y agoNo. The atomic number is defined as the number of protons in each nucleus of an atom, but the mass number is the sum of the numbers of protons and neutrons in the nucleus. Since the number of neutrons is never negative, the sum can not be smaller than the number of protons.
Wiki User
∙ 14y agoNo, the mass number is always greater than the atomic number (with one exception - 11H).
Wiki User
∙ 13y agoYes but only if there are no neutrons, such as in hydrogen (atomic number=1, relative Atomic Mass-1)
Wiki User
∙ 8y agono
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How many of the first twenty elements in the periodic table have isotopes?
19 ------------------------------------------- Actually all elements have isotopes. Isotopes are atoms that have different amount of neutrons. If you ever notice the atomic mass of an atom, it is the average atomic mass of all isotopes. If an atom had no isotope then that number would be an integer.
Has human ever seen a single atom?
No nobody has ever seen an atom or atoms, though many people/scientists claim they have, NOBODY HAS EVER SEEN AN ATOM!
What is the old word for atomic no 7?
"Old" name? I wasn't aware there was a new name; it's been nitrogen pretty much ever since it was discovered.
How many protons and electrons does a chloride ion have?
Protons = 17, electrons = 18There are two isotopes differing in neutron number only :Cl-35 (75%) having 35-17= 18 neutronsCl-37 (25%) having 37-17= 20 neutrons
Who saw an atom first time?
no ... no one ever was able to see an atom , but one guy once saw its shadow by mistake , and that was actually the way atoms were discovered hope i helped ^^
What can be determined if you know the atomic number of an electrically neutral atom?
The number of electrons can be determined if the overall charge and number of protons are known. If the charge of an atom is neutral, then how ever many protons it has it will also have that number of electrons.
What atom has the atomic number 6?
You could look it up by just typing it into google (Just in case you ever need to know..) Carbon: C Atomic number: 6 (number of protons in nucleus) Atomic mass: 12.011 a.m.e. Mass number: 12 (=number of protons + neutrons in nucleus) Nonmetal
What is the biggest atomic number?
The atom discovered with the highest atom number = number of proton = number of electrons Note that some negative ions might be bigger. The biggest element so far discovered is 294Uuo (Ununoctium, element 118), a superheavy transactinide element. Only a small number of atoms of this element have ever been produced. The caesium atom with an empirical radius of 260 pm.
Do hydrogen and oxygen have the same number of electrons?
NO! No atom of one element ever has the same atomic number as an atom of a different element, because atomic number is the property that characterizes an element and distinguishes it from all other elements.
Could an atom ever have a higher atomic number then a mass number?
No, atomic number (z) is always bigger or at least equal to mass number (m). (If there were NO neutrons (n=0): z=p=m-n=m-0=m , ie. Hydrogen with p=1, n=0, z=m)
What part of the atom contains the least atomic mass?
Electron. Contains basicaly no mass what so ever.
What element has the atomic number of 168?
The element with the highest atomic number is Ununoctium (total quantity that has ever existed: three atoms), and its atomic number is 118. Thulium has an atomic weight of 168.9342.
How many neutrons are in an atom with an atomic number of 3?
The elemnt with atomic number 3 is Lithium. There is no easy way of determining how many neutrons are in an atom, in Lithium there are two stable isotopes, 6Li with 3 neutrons and 7Li with 4. The most common is 7Li. If you ever have to guess because you dont have access to Wikipedia or a table of the elements which shows the different isotopes, there are often the same number of neutrons as protons in stable isotopes.
Is splitting an atom exothermic?
yes, have you ever seen an Atomic Bomb blast! Well that is the splitting od atoms.
How many of the first twenty elements in the periodic table have isotopes?
19 ------------------------------------------- Actually all elements have isotopes. Isotopes are atoms that have different amount of neutrons. If you ever notice the atomic mass of an atom, it is the average atomic mass of all isotopes. If an atom had no isotope then that number would be an integer.
What is the scientific definition for an atom?
The smallest particle that can ever be found, it cannot be broken down in to anything smaller
What was lithiums atomis number?
Li is atom number three, not only 'was' but it still is and ever will be.
