Periodic Classification of Elements Quiz 1

If A, B and C are Dobereiner’s Triads of atomic mass x, y and z respectively. Then, which of the following relation is correct?

The number of triads identified, from the elements known at that time by Dobereiner.

Name of the element after which octaves rule did not possess properties similar to that of the first.

Which of the following pairs have similar chemical properties?

According to Henry Moseley, ‘Z’ of an element is a more fundamental property than its atomic mass. ‘Z’ is ________.

According to the modern periodic law, ‘properties of elements are a periodic function of their ___________.

According to modern periodic table metals are _______.

Which of the following is correct for a group element?

Number of columns in the modern periodic table.

Which of the following is correct for a period of modern periodic table?

The maximum number of electrons that can be accommodated in a shell.

Number of elements present in the $5^{th}$ period of the modern periodic table.

Which of the following element has highest atomic radius?

Which of the following is metalloids?

Element ‘X’ forms a chloride with formula XCl. Which is a solid with a high melting point. ‘X’ would most likely be in the same group of the periodic table as