Concept explainers
Complete the following table.
Name | Symbol | Mass Number | Number of Neutrons | |
8 |
9 |
|||
iron |
10 |
20 |
||
56 |
||||
cobalt |
59 |
|||
56 |
||||
28 |
||||
chromium |
26 |
Interpretation:
To determine, missing atomic number, symbol and name in the given table.
Concept Introduction:
Mass number is equal to the total number of protons + number of neutrons.
Atomic number of any element indicates number of protons or number of electrons in the given atom.
Answer to Problem 42QAP
The complete table is as follows:
Name | symbol | Atomic number | Mass number | Number of neutrons |
Oxygen | 8 | 17 | 9 | |
Oxygen | 8 | 17 | 9 | |
Neon | 10 | 20 | 10 | |
Iron | 26 | 56 | 30 | |
Plutonium | 94 | 244 | 150 | |
Cobalt | 27 | 59 | 32 | |
Nickel | 28 | 56 | 28 | |
Fluorine | 9 | 19 | 10 | |
Chromium | 24 | 50 | 26 |
Explanation of Solution
The atomic symbol notation is as follows:
Here A = mass number which is equal to the total number of protons + number of neutrons, Z = atomic number of any element which is also indicates Number of protons or number of electron in the given atom
The complete table is as follows:
Name | symbol | Atomic number | Mass number | Number of neutrons |
Oxygen | 8 | 17 | ||
Oxygen | 8 | 9 | ||
Neon | 10 | 20 | ||
Iron | 26 | 56 | ||
Plutonium | 94 | 244 | ||
Cobalt | 27 | 59 | ||
Nickel | 28 | 56 | ||
Fluorine | 9 | 19 | ||
Chromium | 24 | 26 |
In the given formulas, A = mass number and Z = atomic number of any element.
Oxygen:
The number of electrons is equal to the number of protons in a neural atom.
The atomic number of this atom is 8, (oxygen) because atomic number of any element is equal to the number of protons in the given atom or ion.
And mass number is 17 which is equal to the total number of protons + number of neutrons. Thus, number of neutrons = 9
The atomic symbol for this atom of oxygen is:
Neon:
The number of electrons is equal to the number of protons in a neural atom.
The atomic number of this atom is 10, (neon) because atomic number of any element is equal to the number of protons in the given atom or ion.
And mass number is 20 which is equal to the total number of protons + number of neutrons. Thus, number of neutrons = 10
The atomic symbol for this atom is:
Iron:
The number of electrons is equal to the number of protons in a neural atom.
The atomic number of this atom is 26, (iron) because atomic number of any element is equal to the number of protons in the given atom or ion.
And mass number is 56 which is equal to the total number of protons + number of neutrons. Thus, number of neutrons = 30
The atomic symbol for this atom is:
Plutonium:
The number of electrons is equal to the number of protons in a neural atom.
The atomic number of this atom is 94, (plutonium) because atomic number of any element is equal to the number of protons in the given atom or ion.
And mass number is 244 which is equal to the total number of protons + number of neutrons. Thus, number of neutrons = 150
The atomic symbol for this atom is:
Cobalt:
The number of electrons is equal to the number of protons in a neural atom.
The atomic number of this atom is 27, (cobalt) because atomic number of any element is equal to the number of protons in the given atom or ion.
And mass number is 59 which is equal to the total number of protons + number of neutrons. Thus, number of neutrons = 32
The atomic symbol for this atom is:
Nickel:
The number of electrons is equal to the number of protons in a neural atom.
The atomic number of this atom is 28, (nickel) because atomic number of any element is equal to the number of protons in the given atom or ion.
And mass number is 56 which is equal to the total number of protons + number of neutrons.
Thus, number of neutrons = 28
The atomic symbol for this atom is:
Fluorine:
The number of electrons is equal to the number of protons in a neural atom.
The atomic number of this atom is 9, (fluorine) because atomic number of any element is equal to the number of protons in the given atom or ion.
And mass number is 19 which is equal to the total number of protons + number of neutrons. Thus, number of neutrons = 10
The atomic symbol for this atom is:
Chromium:
The number of electrons is equal to the number of protons in a neural atom.
The atomic number of this atom is 24, (chromium) because atomic number of any element is equal to the number of protons in the given atom or ion.
And mass number is 54 which is equal to the total number of protons + number of neutrons. Thus, number of neutrons = 26
The atomic symbol for this atom is:
The complete table is as follows:
Name | symbol | Atomic number | Mass number | Number of neutrons |
Oxygen | 8 | 17 | 9 | |
Oxygen | 8 | 17 | 9 | |
Neon | 10 | 20 | 10 | |
Iron | 26 | 56 | 30 | |
Plutonium | 94 | 244 | 150 | |
Cobalt | 27 | 59 | 32 | |
Nickel | 28 | 56 | 28 | |
Fluorine | 9 | 19 | 10 | |
Chromium | 24 | 50 | 26 |
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