Advertisements
Advertisements
Question
Which of the following set of elements is written in order of their increasing metallic character?
Options
Be Mg Ca
Na Li K
Mg Al Si
C O N
Solution
Be Mg Ca
Explanation -
In the modern periodic table, metallic character of elements increases down the group and the metallic character decreases along the period from left to right.
APPEARS IN
RELATED QUESTIONS
Give the trend in metallic character:
down the group top to bottom.
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive metal
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The element at the bottom of a group would be expected to show ______ metallic character than the element at the top.
Use the information given in (a) to (h) to identify the substances P to W selecting your answers from the given list.
List:
| Calcium | Oxygen | Copper (II) Oxide |
| Carbon | Calcium hydroxide | Copper (II) Nitrate |
| Lead (II) Oxide | Hydrogen chloride | Chlorine |
| Lead (II) Nitrate | Calcium Oxide | Ammonium chloride |
- P is white solid. When heated produces white fumes (sublime).
- P and R on warming produce an alkaline gas.
- On adding water to T, heat is evolved and R is formed.
- Q burns brightly in the air to form T.
- When S is heated, it gives off brown fumes and leaves a black residue of U.
- A solution of S is formed by warming U with dilute nitric acid.
- V is a gaseous non-metallic element that reacts with hydrogen to form W.
- A solution of W will neutralize the solution of R.
The metallic character of the element decreases moving across a period from left to the right.
On moving down the group metallic character increases.
Three elements B, Si and Ge are
Identify the elements with the following property and arrange them in increasing order of their reactivity
- An element which is a soft and reactive metal
- The metal which is an important constituent of limestone
- The metal which exists in liquid state at room temperature
Choose the odd one out and write the reason:
