(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Chemistry

X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

______ is the metallic element.

X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

Metal atoms tend to have a maximum of ______ electrons in the outermost shell.

X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

______ is the reducing agent.

State the group and period, of the element having three shells with three electrons in valence shell.

Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D and E. 

Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?

Name the metalloids in the first twenty elements.

Name the non-metals in the first twenty elements.

What is the general name of the last elements of the Periodic Table?

Name the following metal:

A metal present in period 3, group 1 of the periodic table.

An element has 2 electrons in its N shell.

State its position in periodic table.

An element has 2 electrons in its N shell.

Is it a metal or a non-metal?

Answer the following in respect of element \[\ce{_16^32S}\].

Give its electronic configuration.

Answer the following in respect of element \[\ce{_16^32S}\].

To which group and period does it belong?

Answer the following in respect of element \[\ce{_16^32S}\].

Give its formula with hydrogen.

Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D and E.

Match the atomic number with the following:

A rare gas.

Match the atomic number with the following:

An element of group 2.

Give reason for the following:

Inert gases do not form ion.

A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).

Boron, Aluminium, Gallium, Indium, Thallium

Answer the following question in relation to the above group of elements:

If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?