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

Name the type of elements which have outermost shell complete.

Name the type of elements which have outermost shell incomplete.

Name the type of elements which have two outermost shell incomplete.

Name the type of elements which have one electron short of octet.

Name the type of elements which have two electrons in the outermost orbit.

State its position in the periodic table?

Answer the following in respect of element `31/15 P `

To which group and period does it belong?

Arrange the elements of second and third periods in increasing order of their atomic size.

Third Period.

How do atoms attain noble gas configuration?

How does the electronic configuration of an atom relate to its position in the modern periodic table?

Define a chemical bond.

Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.

Answer the following in respect of element `31/15 P`

Give its electronic configuration

What is the main characteristic of the last element in each period of the periodic table?

Mention the basic tendency of an atom which makes it to combine with other atoms.

Fill in the blank:

The horizontal rows in the periodic table are called _____________.

An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.

What will be the formula of its phosphate?

Elements A, B and C have atomic number 17, 19 and 10 respectively.

State which one is a non-metal.

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)?

Five atoms are labelled from A to E.

(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?