Advertisements
Advertisements
Question
Give the symbol and valency of the following element and radical.
Sodium
Advertisements
Solution
| Element/Radical | Symbol | Valency |
| Sodium | Na | one |
APPEARS IN
RELATED QUESTIONS
The position of three elements A, B and C in the Periodic Table are shown below –
|
Group 16
|
Group 17
|
|
−
|
−
|
|
−
|
A
|
|
−
|
−
|
|
B
|
C
|
(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Give two example of group 18 elements.
Would you place the two isotopes of chlorine, CI-35 and CI-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
What is the number of elements in the 3rd period, of the modern periodic table?
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Give the symbol and valency of the following element and radical.
Potassium
Write a scientific reason.
Lithium and sodium are included in the same group in the periodic table.
Explain the position of hydrogen in the periodic table.
