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.

검증된 단계별 안내

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.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

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.

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.