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Its the bottom number E.g. if there was a 35 at the top of.. > Cl
and 17 at the bottom of.. > Cl
Cl (Chlorine) would have the atomic number 17. This means it would also have 17 protons, 17 electrons and 18 neutrons. i.e 35-17 = 18 which is the number of neutrons :)
Ahh the one time i listen in chemistry helps me, AND someone else!! Or atleast i hope i helped.
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∙ 14y ago
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∙ 12y agothe atomic number. The top is the Mass (sum of the protons and neutrons).
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∙ 15y agoIt's the atomic number, which is the number of protons (positively charged particles) in the nucleus. (In an electrically neutral atom, it's also the number of electrons.)
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∙ 13y agoNot exactly sure but I think it is the mass number
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∙ 11y agoGenerally the number stands for the mass number of the atom (or the Atomic Mass number).
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∙ 10y agoIf Element is like ZXN , Z= Atomic No. and N= no. of atoms in the molecule (atomicity).
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∙ 13y agoThat is the atomic mass.....
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∙ 15y agoCharge
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What happens to the atomic number from top to bottom in a column?
The atomic number at the top is always less than the atomic number at the bottom of the column
Are protons the number on top or the bottom?
For a given isotope of an element, the "top number" (e.g. 14C or carbon-14) is the atomic mass number, the total of neutrons and protons. The bottom number, if displayed, is the atomic number (e.g. 6C all isotopes of carbon have 6 protons). To find the number of neutrons, subtract the atomic number from the isotopes atomic mass number. Here, 14C will have 8 neutrons, and the result is that it is an unstable radioactive isotope. Many stable elements, however, have many more neutrons than protons.
What does the atomic number indicate about an element?
The atomic number is the number of protons in the nucleus of one atom of the element.
How does the atomic number change as you move left or right of the periodic table?
left to right - increases (by 1s)right to left - decreases (by 1s)top to bottom - increases (big steps)bottom to top - decreases (big steps)
What do the numbers and letters in the periodic table represent?
either mass or protons the top is the atomic number it shows how many protons the bottom number is the atomic mass also the weight
Is the atomic mass on the bottom or top?
At the bottom, the atomic number is at the top.
What happens to the atomic number from top to bottom in a column?
The atomic number at the top is always less than the atomic number at the bottom of the column
What is the difference between atomic mass unit and atomic mass?
Atomic mass unit is the number on the bottom of the Chemical. However, the atomic mass is the number on the top of the chemical minus the number on the bottom. b.t.w The no. of neutrons = top no. minus bottom no.
What happens to the atomic size from the top of the periodic table to the bottom?
The atomic size increase from top to bottom of Periodic Table. As the number of shells increases from top to bottom, the atomic size increases.
What happens to the atomic size from the top to the bottom of the periodic table?
The atomic size increase from top to bottom of periodic table. As the number of shells increases from top to bottom, the atomic size increases.
How many neutrons are in alumnium?
14 - Subtract atomic mass(usually bottom #) from atomic number(usually top #).
What happens to the atomic number as you move down the alkal metal group?
The atomic number increases, because as you move from top to bottom, you are adding protons to the nucleus, and atomic number is the number of protons.
Are protons the number on top or the bottom?
For a given isotope of an element, the "top number" (e.g. 14C or carbon-14) is the atomic mass number, the total of neutrons and protons. The bottom number, if displayed, is the atomic number (e.g. 6C all isotopes of carbon have 6 protons). To find the number of neutrons, subtract the atomic number from the isotopes atomic mass number. Here, 14C will have 8 neutrons, and the result is that it is an unstable radioactive isotope. Many stable elements, however, have many more neutrons than protons.
The stranded atomic notation for an atom that has an atomic number of 4 and 5 neutrons?
It would be 9 on top, 4 on bottom and then Be.
Why the relative atomic mass of an element in th periodic table in fractional form?
The top left number is the mass (neutrons&protons) and the bottom left number is the atomic number(protons)
What happens to atomic radius as you move from bottom to top of the periodic table?
atomic radius decreases from bottom to top of the periodic table.
Which of these describes atomic radii as one moves from top to bottom within a group?
The atomic radius increases from top to bottom within a group.
