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What are the special features of the following group of elements? 1. All these elements are metals 2. All these elements react with water to form hydrogen gas 3. All these elements have a valency 1

What are the special features of the following group of elements? 1. All these elements are metals 2. All these elements react with water to form hydrogen gas 3. All these elements have a valency 1 Correct Answer Alkali metal group

The correct answer is Alkali metal group.

Key Points

  • Alkali Metals:
    • Group 1 of the periodic table consists of namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). 
  • Properties of Alkali metals:
    • They have high thermal and electrical conductivity, lustre, ductility, and malleability.
    • All these elements react with water to form hydrogen gas.
    • Each of these, alkali metal atoms has a single electron in its outermost shell. Hence, their valency is 1.

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Related Questions

The following are special characteristics of a group of elements?
1. All these elements are metals
2. All these elements react with water to form hydrogen gas.
3. All these elements have a valence (1)
Which of the following statement is/are true? I. Some metals react with water to produce metal hydroxides and hydrogen gas II. Generally, nonmetals do not react with water 
What mass of chlorine gas must be taken to completely react with 10 g of hydrogen gas to produce hydrogen chloride gas?
Which of the given statements is/are correct?
1. The elements of the second group are called alkali metals.
2. The elements of the first group are called alkaline soil metals.
3. Elements of the 17th group are called halogen.
Recently, there has been a concern over the short supply of a group of elements called 'rare earth metals.' Why? 1. China, which is the largest producer of these elements, has imposed some restrictions on their export. 2. Other than China, Australia, Canada and Chile, these elements are not found in any country. 3. Rare earth metals are essential for the manufacture of various kinds of electronic items and there is a growing demand for these elements. Which of the statements given above is/are correct?
Given below are three quantities named A, B and C. Based on the given information, determine the relation among the three quantities. Quantity A∶  A 30 litre mixture of wine and water has wine and water in the ratio 5∶ 7. How much water must be drawn off so that the ratio of wine and water becomes 25∶ 19? Quantity B∶ A 35 litre mixture of wine and water has wine and water in the ratio 1∶ 3. How much water must be drawn off so that the ratio of wine and water becomes 1.75∶ 3.35? Quantity C∶ A 27 litre mixture of wine and water has wine and water in the ratio 3∶ 2. How much water must be drawn off so that the ratio of wine and water becomes 81∶ 11?
S1:Metals are today being replaced by polymers in many applications.
P :Above all, they are cheaper and easier to process making them a viable alternative to metals.
Q :Polymers are essentially a long chains of hydrocarbon molecules.
R :Today polymers as strong as metals have been developed.
S :These have replaced the traditional chromium-plated metallic bumpers in cars.
S6:Many Indian Institutes of science and Technology run special programmes on polymer science.

The Proper sequence should be:
What happens when calcium is treated with water? It does not react with water. It reacts violently with water. It reacts less violently with water. Bubbles of hydrogen gas formed stick to the surface of calcium.
The following question has two premises and two conclusions. If the premises re assumed to be true (irrespective of factuality), then, in respect of each of the items given below, which of the following conclusions follow logically? Premises: All metals are grey in colour. Some metals are heavy. Conclusion: I. All heavy metals are grey in colour. II. All light metals are not grey in colour.
Which of the given statements is/are true? A. The 2nd group elements are called Alkali metals. B. The 1st group element is called Alkaline metals. C. The 17th group elements are called Halogens.