Download App

Structure of the Atom — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
Question
Find the electron distribution for the element that has atomic number 17 and write its valency.
✓

Answer

Atomic no. of element = 17
Electronic configuration 2, 8, 7
Since it requires one more electron to complete its stable gas configuration, so the valency is 1.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Do as directed; [Che-1 M]" from Structure of the Atom→Structure of the Atom — all question types→Science STD 9 question papers→CBSE Board STD 9 question papers→CBSE Board question paper generator→

Similar questions

Give two symbols which have been derived from the “Latin names” of the elements.
→
What are isobars? Explain with an example.
→
Name the temperature at which:
A solid changes into a liquid.
→
What do we call those particles which are formed:
By the loss of electrons by atoms?
→
Why is it not possible to see an atom with naked eyes?
→
Name the elements represented by the following symbols:
Hg, Pb, Au, Ag, Sn.
→
What name is given to the amount of substance containing this number of atoms?
→
Name a metal:
Which has a low melting point.
→
What is the physical state of water:
at 250°C?
→
Out of a colloid, solution and a suspension:
Which one has the largest particles?
→