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Which pair of atomic numbers represents elements in the same group?
- a)6, 12
- b)11, 19
- c)4, 16
- d)8, 17
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which pair of atomic numbers represents elements in the same group?a)6...
Explanation:
Group in the Periodic Table:
In the periodic table, elements are arranged in rows called periods and columns called groups. Elements in the same group have similar properties and chemical behavior. The group number corresponds to the number of valence electrons an element has.
Atomic Numbers:
Atomic numbers represent the number of protons in an atom's nucleus. The atomic number determines the element's identity and its position in the periodic table.
Elements in the Same Group:
To identify elements in the same group, we need to consider their atomic numbers. Elements in the same group have the same number of valence electrons, which determines their chemical properties.
Option B:
The given pair of atomic numbers is 11 and 19. These atomic numbers represent the elements sodium (Na) and potassium (K).
- Sodium (Na) has an atomic number of 11. It belongs to Group 1 in the periodic table, also known as the alkali metals group.
- Potassium (K) has an atomic number of 19. It also belongs to Group 1 in the periodic table.
Since both sodium and potassium have the same group number (1) and belong to the alkali metals group, they have similar properties and chemical behavior. Therefore, option B is the correct answer.
Other Options:
Let's analyze the other options to understand why they are incorrect:
a) The atomic numbers 6 and 12 represent carbon (C) and magnesium (Mg) respectively. Carbon belongs to Group 14, while magnesium belongs to Group 2. Therefore, they are not in the same group.
c) The atomic numbers 4 and 16 represent beryllium (Be) and sulfur (S) respectively. Beryllium belongs to Group 2, while sulfur belongs to Group 16. Therefore, they are not in the same group.
d) The atomic numbers 8 and 17 represent oxygen (O) and chlorine (Cl) respectively. Oxygen belongs to Group 16, while chlorine belongs to Group 17. Therefore, they are not in the same group.
Conclusion:
The pair of atomic numbers 11 and 19 (sodium and potassium) represents elements in the same group (Group 1, alkali metals).
Group in the Periodic Table:
In the periodic table, elements are arranged in rows called periods and columns called groups. Elements in the same group have similar properties and chemical behavior. The group number corresponds to the number of valence electrons an element has.
Atomic Numbers:
Atomic numbers represent the number of protons in an atom's nucleus. The atomic number determines the element's identity and its position in the periodic table.
Elements in the Same Group:
To identify elements in the same group, we need to consider their atomic numbers. Elements in the same group have the same number of valence electrons, which determines their chemical properties.
Option B:
The given pair of atomic numbers is 11 and 19. These atomic numbers represent the elements sodium (Na) and potassium (K).
- Sodium (Na) has an atomic number of 11. It belongs to Group 1 in the periodic table, also known as the alkali metals group.
- Potassium (K) has an atomic number of 19. It also belongs to Group 1 in the periodic table.
Since both sodium and potassium have the same group number (1) and belong to the alkali metals group, they have similar properties and chemical behavior. Therefore, option B is the correct answer.
Other Options:
Let's analyze the other options to understand why they are incorrect:
a) The atomic numbers 6 and 12 represent carbon (C) and magnesium (Mg) respectively. Carbon belongs to Group 14, while magnesium belongs to Group 2. Therefore, they are not in the same group.
c) The atomic numbers 4 and 16 represent beryllium (Be) and sulfur (S) respectively. Beryllium belongs to Group 2, while sulfur belongs to Group 16. Therefore, they are not in the same group.
d) The atomic numbers 8 and 17 represent oxygen (O) and chlorine (Cl) respectively. Oxygen belongs to Group 16, while chlorine belongs to Group 17. Therefore, they are not in the same group.
Conclusion:
The pair of atomic numbers 11 and 19 (sodium and potassium) represents elements in the same group (Group 1, alkali metals).
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Community Answer
Which pair of atomic numbers represents elements in the same group?a)6...
The difference between atomic numbers is 8.
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Which pair of atomic numbers represents elements in the same group?a)6, 12b)11, 19c)4, 16d)8, 17Correct answer is option 'B'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Which pair of atomic numbers represents elements in the same group?a)6, 12b)11, 19c)4, 16d)8, 17Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which pair of atomic numbers represents elements in the same group?a)6, 12b)11, 19c)4, 16d)8, 17Correct answer is option 'B'. Can you explain this answer?.
Which pair of atomic numbers represents elements in the same group?a)6, 12b)11, 19c)4, 16d)8, 17Correct answer is option 'B'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Which pair of atomic numbers represents elements in the same group?a)6, 12b)11, 19c)4, 16d)8, 17Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which pair of atomic numbers represents elements in the same group?a)6, 12b)11, 19c)4, 16d)8, 17Correct answer is option 'B'. Can you explain this answer?.
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