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Chemistry Chapter 4 : Topic 6
Periodic Table Families
1 / 10
A student observes that a group of elements is highly reactive, soft in nature, and easily loses one electron to form + 1 ions. These elements are stored under oil in laboratories due to their vigorous reaction with air and water. Which group of elements is being described?
Reasoning: Alkali metals (Group 1) are highly reactive, soft, and have one valence electron, which they easily lose to form + 1 ions.
2 / 10
A chemist compares two groups of metals. One group forms + 2 ions and is harder than the first group discussed above, while still being reactive. These metals are commonly found in minerals like limestone and gypsum. Which group is being referred to?
Reasoning: Alkaline earth metals (Group 2) form + 2 ions and are harder and less reactive than alkali metals.
3 / 10
A set of elements is found in the periodic table that exists in all three states at room temperature (solid, liquid, gas), and they are known for forming salts by gaining one electron from metals. Which group is this?
Reasoning: Halogens (Group 17) are highly reactive non-metals that form salts and exist in different physical states.
4 / 10
An element group is identified in which all members are extremely unreactive, do not readily form compounds, and have a complete outermost electron shell, making them very stable. Which group is being described?
Reasoning: Noble gases (Group 18) are inert due to their complete valence shell.
5 / 10
A scientist studies a block of elements located in the middle of the periodic table. These elements show variable oxidation states, form colored compounds, and are good catalysts in industrial reactions. Which group best matches these properties?
Reasoning: Transition metals show variable oxidation states and act as catalysts, often forming colored compounds.
6 / 10
In a research lab, a series of elements is found that are placed separately at the bottom of the periodic table. These elements include those used in nuclear reactions and have unstable radioactive properties. Which group do these elements belong to?
Reasoning: Actinides are radioactive elements used in nuclear processes and are placed separately at the bottom of the periodic table.
7 / 10
A group of elements is observed that are silvery-white metals, relatively soft, and widely used in alloys. These elements fill the 4f orbital and are often called “rare earth metals”. Which group is being described?
Reasoning: Lanthanides are known as rare earth metals and involve filling of 4f orbitals.
8 / 10
An element reacts violently with water, producing hydrogen gas and forming a strong alkaline solution. It is stored carefully in kerosene and has only one electron in its outermost shell. Which classification fits this element?
Reasoning: Alkali metals react violently with water and form alkaline solutions.
9 / 10
A group of elements is highly electronegative and tends to gain one electron during reactions. These elements are commonly used in disinfectants and can form diatomic molecules. Which group is being referred to?
Reasoning: Halogens are highly electronegative and form diatomic molecules likeCl₂.
10 / 10
An element group is studied that shows smooth decrease in reactivity from top to bottom, is gaseous at room temperature, and does not normally participate in chemical bonding due to full valence shells. Which group is this?
Reasoning: Noble gases are inert, gaseous, and chemically stable due to full outer electron shells.
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