Advertisements
Advertisements
Question
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
Solution
As we move from left to right in a period, the size decreases, therefore, it will be smaller than Cesium.
RELATED QUESTIONS
On which side of the periodic table will you find metals?
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
Explain why All the elements of a period have different chemical properties.
What is a group in the 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 elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
Give the symbol and valency of the following element and radical.
Sulphate
Give the chemical formula of ammonium sulphate
