Fill in the gaps in the following table, assuming each column represents a neutral atom. Symbol 112 Cd Protons 38 92 Neutrons 58 49 Electrons 38 36 Mass no. 81 235 Complete the second row of the table.

Hi everyone here we have a question asking us to consider the following table showing symbols, the number of protons, electrons and neutrons and the mass number. Each column represents a neutral atom and our goal is to fill in the third column of this table. So one key aspect here is that it represents a neutral atom, which means the number of electrons is going to equal the number of protons. So we know we have 50 electrons, which means we will also have 50 protons. And our protons is the same as our atomic number. So if we look on the periodic table for the atomic number 50, we see that it is 10. And to find the mass number, the mass number equals the number of protons plus the number of neutrons, Which in this case is plus 50 Which equals 118. So our mass number is 118 And we will have a 118 above the 10 symbol. So that is our final answer. Thank you for watching. Bye.

Ch.2 - Atoms, Molecules, and Ions

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Brown 15th Edition

Ch.2 - Atoms, Molecules, and Ions

Problem 30b

Chapter 2, Problem 30b

Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol ¹¹²Cd
Protons 38 92
Neutrons 58 49
Electrons 38 36
Mass no. 81 235
Complete the second row of the table.

Verified step by step guidance

Identify the atomic number of the element with the symbol Cd. The atomic number is equal to the number of protons in a neutral atom.

Calculate the number of neutrons in the isotope of Cd by subtracting the atomic number from the mass number. Neutrons = Mass number - Atomic number.

Determine the number of electrons in a neutral atom of Cd. In a neutral atom, the number of electrons is equal to the number of protons.

Verify the mass number of Cd by adding the number of protons and neutrons together. Mass number = Protons + Neutrons.

Fill in the missing values for the element symbol Cd in the table based on the calculations and identifications made in the previous steps.

Verified Solution

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Atomic Structure

Atomic structure refers to the composition of an atom, which includes protons, neutrons, and electrons. Protons are positively charged particles found in the nucleus, while neutrons are neutral particles also located in the nucleus. Electrons are negatively charged and orbit the nucleus. Understanding the arrangement and number of these subatomic particles is crucial for identifying the properties of an element.

Isotopes

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons. This difference in neutron count results in varying atomic masses. For example, the symbol 112Cd indicates a cadmium isotope with a mass number of 112, which can be calculated by adding the number of protons and neutrons. Recognizing isotopes is essential for completing the table accurately.

Mass Number

The mass number of an atom is the total count of protons and neutrons in its nucleus. It is represented as a superscript to the left of the element's symbol, such as in 112Cd. The mass number helps in identifying isotopes and is crucial for calculations involving atomic mass and stability. Understanding how to derive the mass number from the given protons and neutrons is key to filling in the gaps in the table.

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Related Practice

Textbook Question

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ⁷⁹Br

Protons 25 82

Neutrons 30 64

Electrons 48 86

Mass no. 222 207

Complete the fourth row of the table.

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views

Textbook Question

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ⁷⁹Br

Protons 25 82

Neutrons 30 64

Electrons 48 86

Mass no. 222 207

Complete the fifth row of the table.

396

views

Textbook Question

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ¹¹²Cd

Protons 38 92

Neutrons 58 49

Electrons 38 36

Mass no. 81 235

Complete the first row of the table.

484

views

Textbook Question

Fill in the gaps in the following table, assuming each column represents a neutral atom.

Symbol ¹¹²Cd

Protons 38 92

Neutrons 58 49

Electrons 38 36

Mass no. 81 235

Complete the third row of the table.

Complete the fourth row of the table.

636

views

Textbook Question

Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements in the front inside cover as needed: (a) the isotope of platinum that contains 118 neutrons

815

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Textbook Question

Write the correct symbol, with both superscript and subscript, for each of the following. Use the list of elements in the front inside cover as needed: (b) the isotope of krypton with mass number 84 (c) the isotope of rhenium with mass number 187

977

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Fill in the gaps in the following table, assuming each column represents a neutral atom.Symbol 112CdProtons 38 92Neutrons 58 49Electrons 38 36Mass no. 81 235Complete the second row of the table.

Verified Solution

Key Concepts

Atomic Structure

Isotopes

Mass Number

Fill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol ¹¹²Cd
Protons 38 92
Neutrons 58 49
Electrons 38 36
Mass no. 81 235
Complete the second row of the table.