Podcast
Questions and Answers
What is the electron configuration of potassium?
What is the electron configuration of potassium?
Which group contains the noble gases?
Which group contains the noble gases?
What is the main reason Group 1 elements are highly reactive?
What is the main reason Group 1 elements are highly reactive?
What compound is formed when chlorine reacts with hydrogen?
What compound is formed when chlorine reacts with hydrogen?
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In which period is calcium found?
In which period is calcium found?
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Group 7 elements are also known as what?
Group 7 elements are also known as what?
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Why are noble gases considered inert?
Why are noble gases considered inert?
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What happens to the reactivity of halogens as you move down Group 7?
What happens to the reactivity of halogens as you move down Group 7?
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Study Notes
Multiple Choice Questions (Q1-Q5)
- Q1: The electron configuration of potassium is 2, 8, 8, 1. (a)
- Q2: Noble gases are in Group 18. (d)
- Q3: Group 1 elements are highly reactive because they have one electron in their outer shell. (a)
- Q4: The compound formed when chlorine reacts with hydrogen is hydrogen chloride. (b)
- Q5: Calcium is found in Period 4. (c)
Fill in the Gaps (Q6-Q10)
- Q6: The electron configuration of calcium is 2, 8, 8, 2.
- Q7: Elements in the same group have the same number of electrons in their outer shell.
- Q8: Group 1 elements react with water to form alkalis and hydrogen gas.
- Q9: The period number represents the number of occupied electron shells in an element.
- Q10: Noble gases are the least reactive group of elements because they have a full outer shell.
True/False (Q11-Q15)
- Q11: True. Group 7 elements are also known as halogens.
- Q12: False. Noble gases are inert (not reactive) because they have full outer shells
- Q13: False. The reactivity of Group 1 elements increases as you go down the group.
- Q14: True. Elements in the same period have the same number of electron shells.
- Q15: True. Potassium is more reactive than lithium.
Short Answer Questions (Q16-Q20)
- Q16: Elements in the same group have similar chemical properties due to having the same number of electrons in their outer shell, thus leading to similar reactivity patterns.
- Q17: Noble gases are considered inert because their outer electron shells are full, making them stable and unreactive.
- Q18: Group 1 elements are highly reactive, readily losing their single outer electron. Group 7 elements are also reactive, readily gaining an electron to complete their outer shell. Their reactivities differ significantly.
- Q19: The reactivity of halogens decreases as you move down Group 7. This is because the outer electrons are further from the nucleus and experience less attraction.
- Q20: Elements form ions to achieve a stable electron configuration, typically a full outer shell. This stable configuration allows them stability, similar to noble gases.
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Description
Test your knowledge of chemistry with this quiz designed for 10th-grade students. It covers topics such as electron configurations, group properties of elements, and reactivity of substances. Answer multiple choice, fill-in-the-gap, and true/false questions to gauge your understanding!
