2006-10-21 22:26:42 · 11 answers · asked by Mumu 2 in Science & Mathematics ➔ Chemistry
The atomic number is the number of PROTONs in an atom (e.g., Oxygen has 8 protons and atomic number of 8).
Atomic mass is the number of PROTONs and NEUTRONs.
2006-10-21 22:34:46 · answer #1 · answered by Da Judge 3 · 1⤊ 0⤋
Atomic number is the number of Protons and Electrons in a atom. It is showed with the letter Z and is showed in every periodic system. For example: Mg Has 12 protons 12 electrons and 12 neutrons.
Atomic mas is the mas of an atom. It ids showed in Dalton‘s (Da). It is also written above or under the symbol of an element. For example: Mg is 24,31 Da. You can calculate it in kg as well but then you use the formula:
mas of the atom x u (1.66 x 0.000000000000000000000000001) 26 zeros.
I tried to explain it simple as possible.
2006-10-21 22:55:03 · answer #2 · answered by jasmina m 1 · 0⤊ 0⤋
Atomic number ( shown by (Z) ) is the number of protons in nucleus of an atom , and atomic mass (shown by (A) ) is the number of protons and neutrons in the atom nucleus , in isotopes of an atom the atomic mass will be changed because of different number of neutrons (number of protons never change )
2006-10-21 22:58:38 · answer #3 · answered by Mohammad Amin Bagheri 2 · 0⤊ 0⤋
You can also find the atomic number of a certain atom by looking on the periodic table, with Hydrogen being "1" and then on threw to...118 I think it is now. Usually the atomic number is above the elements sign, then the atomic mass (again fro hydrogen it is 1, but usually has 1.0000) is right below it with the atoms name below that on a good table.
2006-10-21 22:37:20 · answer #4 · answered by malechicken 1 · 0⤊ 0⤋
Atomic number is the number of protons in the nucleus of an element. It is also equivalent to the number of electrons. The relative atomic mass of an element is the number of times an atom of the element is heavier than one-twelfh of an atom of carbon-12.
2006-10-21 22:36:50 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Atomic number - number of protons in atom: the number of protons in the nucleus of an atom of an element and its isotopes, used to determine that element's position in the periodic table
The atomic number of carbon is 6. Symbol Z.
(Relative) Atomic mass - ratio of atom's mass to carbon-12: the ratio of the average mass per atom of an element to one twelfth of the mass of a carbon-12 atom. Symbol Ar.
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2006-10-21 22:36:16 · answer #6 · answered by Scabius Fretful 5 · 0⤊ 0⤋
atomic number = the number of protons in an atom
(also the number of electrons in a neutral atom)
atomic mass = the number of proton + neutrons in an atom
2006-10-21 22:39:01 · answer #7 · answered by daemon_slayer2 1 · 0⤊ 0⤋
Atomic number = number of protons.
Atomic mass = number of protons + neutrons.
2006-10-22 00:52:12 · answer #8 · answered by Dr. J. 6 · 0⤊ 0⤋
the atomic number is the number of protons found in the nucleus of an atom.
The atomic mass is the mass of an atom at rest.
2006-10-21 22:34:02 · answer #9 · answered by layth 1 · 0⤊ 0⤋
atomic no. is d no. of protons in a nucleus of an atom, while mass no. is d sum of no. of protons n no. of neutrons in an atom.
at. no.=no. of protons
mass no.=no. of protons+no. of neutrons
2006-10-21 22:35:43 · answer #10 · answered by Tan 2 · 0⤊ 0⤋