Advertisements
Advertisements
Question
State the group and period, of the element having three shells with three electrons in valence shell.
Advertisements
Solution
If there are three shells, the element belongs to the third period. An element with three valence electrons belongs to the 13 group.
APPEARS IN
RELATED QUESTIONS
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
Name and state the following with reference to the elements of the first three periods of the periodic table.
A covalent compound formed by an element in period 2 and a halogen.
Give the symbol and valency of the following element and radical.
Zinc
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
E and B
An element has 2 electrons in its N shell.
State its position in periodic table.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
