See if you can complete the following table using only what is on this page. Hint. Two of the entries are for the same element. Element
Symbol
Nuclear
Symbol
Atomic Mass
Protons Neutrons
Electrons in
Number Number
Neutral Atom
57
82
138
57
ola
Fe
59
26

Answer and Explanation:

The empty spaces should be completed step-by-step as follows:

First line:

Element symbol: La (it is the corresponding element for the atomic number 57)

Mass number = Atomic number + Neutrons = 57 + 82 = 139

Nuclear symbol: ¹³⁹₅₇ La because the atomic number is 57 and mass number is 139.

Protons: 57 (is equal to the atomic number for a neutral atom)

Electrons in neutral atom = Atomic number = 57

Second line:

Element symbol: La (it is the corresponding element for the atomic number 57 and mass number 138)

Atomic number: 57 (from the Periodic Table, for La)

Mass number = 138 (from the nuclear symbol)

Protons: 57 (is equal to the atomic number for a neutral atom)

Neutrons = Mass number - Atomic number = 138 - 57 = 81

Electrons in neutral atom = Atomic number = 57

Third line:

Atomic number: 26 (from the Periodic Table, for the element Fe)

Protons: 26 (is equal to the atomic number for a neutral atom)

Neutrons = Mass number - Atomic number = 59 - 26 = 33

Nuclear symbol: ⁵⁹₂₆ Fe because the atomic number is 26 and mass number is 26.

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

the answer to your question is c