Chemistry
Match column A with column B
| Column A | Column B |
|---|---|
| (a) Elements short by 1 electron in octet | (i) Transition elements |
| (b) Highly reactive elements | (ii) Noble gases |
| (c) Non-reactive elements | (iii) Alkali metals |
| (d) Elements of group 3 to 12 | (iv) Alkaline earth metals |
| (e) Radioactive elements | (v) Halogens |
| (f) Elements with 2 electrons in the outermost orbit | (vi) Actinides |
Answer
| Column A | Column B |
|---|---|
| (a) Elements short by 1 electron in octet | (v) Halogens |
| (b) Highly reactive elements | (iii) Alkali metals |
| (c) Non-reactive elements | (ii) Noble gases |
| (d) Elements of group 3 to 12 | (i) Transition elements |
| (e) Radioactive elements | (vi) Actinides |
| (f) Elements with 2 electrons in the outermost orbit | (iv) Alkaline earth metals |
Related Questions
Assertion (A): Cobalt (atomic mass 58.94) is placed before Nickel (atomic mass 58.68) in Mendeleev's periodic table.
Reason (R): Physical and chemical properties of the elements are a periodic function of their atomic masses.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Group 17 elements are known as alkaline earth metals.
Reason (R): Group 17 elements are salt formers.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Write down the word that will correctly complete the following sentences:
(a) Relative atomic mass of a light element up to calcium is approximately …………… its atomic number.
(b) The horizontal rows in a periodic table are called ……………
(c) Going across a period left to right, atomic size ……………
(d) Moving left to right in the second period, number of valence electrons ……………
(e) Moving down in the second group, number of valence electrons ……………
Name or state the following with reference to the elements of the first three periods of the periodic table.
(a) Noble gas with duplet arrangement of electrons.
(b) Metalloid in Period 3.
(c) Valency of elements in Group 14 and 15.
(d) Noble gas having electronic configuration 2, 8, 8.
(e) Group whose elements have zero valency.
(f) A covalent compound formed by an element in period 2 and a halogen.
(g) Non-metallic element present in Period 3 of Groups 15 and 16.
(h) An electrovalent compound formed by an alkaline earth metal and a halogen.
(i) Bridge elements of Period 3 of Group 1, 2 and 3.
(j) Alkali metal in Period 3 that dissolves in water giving a strong alkali.
(k) Typical elements of Groups 14 and 15.
(l) Alkaline earth metal in Period 3.