SCIENCE
CHEMISTRY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Atomic number
|
|
|
Atomic mass
|
|
|
Atomic weight
|
|
|
Oxidation number
|
Detailed explanation-1: -The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.
Detailed explanation-2: -The number of protons in the nucleus of an atom determines an element’s atomic number. In other words, each element has a unique number that identifies how many protons are in one atom of that element. For example, all hydrogen atoms, and only hydrogen atoms, contain one proton and have an atomic number of 1.
Detailed explanation-3: -The atomic number of an element is determined by the number of protons in it, and it is used to differentiate one element from another. The mass number of an element is determined by the number of protons and neutrons combined.
Detailed explanation-4: -Therefore, the total number of protons and neutrons in an atom determines its mass in atomic mass units (Table 4.5. 1).