Define Atomic mass number. Atomic mass number synonyms, Atomic mass number pronunciation, Atomic mass number translation, English dictionary definition of Atomic mass number. n. The sum of the number of neutrons and protons in an atomic nucleus. Also cal
An atom of an element has a proton number of 17 and mass number of 35.Which statement is definitely true to describe the atomic structure of another isotope of this element? D A It has a proton number of 17 and mass number of 35. B Its number of electrons is 18. C Its number of...
Atomic number and mass number are always whole numbers because they are obtained by counting whole objects (protons, neutrons, and electrons). The sum of the mass number and the atomic number for an atom (A-Z) corresponds to the total number of subatomic particles present in the atom. The...
5An atom of an element has a proton number of 17 and mass number of 35.Which statement is definitely true to describe the atomic structure of another isotope of this element? B A It has a proton number of 17 and mass number of 35. B Its number of electrons is 18. C Its number o...
原子序原子序( (Atomic number)Atomic number)及質量數及質量數( ( Mass number) Mass number) 原子內的中子的數目質子的數目電子的數目故稱為原子序(atomic number)相等於原子不帶電荷相等於的總和質量數(mass number)不一定相等
So the atomic mass formula is: atomic mass (u) ≈ number of protons + number of neutrons Or A=Z+NA=Z+N where: AA— Mass number (total number of protons and neutrons); ZZ— Number of protons in the atom; and NN— Number of neutrons in the atom. Note that the mass of an atom...
Atomic number = Number of electrons Atomic number = Number of electrons LecturePLUS Timberlake 13 Subatomic Particles in Some Subatomic Particles in Some Atoms Atoms 16 16 31 31 65 65 OO PP Zn Zn 88 15 15 30 30 8 p 8 p ++ 15 p 15 p ++ 30 p 30 p ++ 8 n 8 n 16 n 16 n ...
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atomic mass 原子质量 mass number 质量数 前者是多少克，后者是多少个 提示一下你就应该明白了，喝喝