Download App

Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom2 Marks
Question
What valencies will be shown by the elements $A, B, C, D$ and $E$ having atomic numbers $2, 4, 8, 10$, and $13$ respectively.
✓

Answer

Valency shown by $A$(atomic no. $2) – 0$ Valency shown by $B$(atomic no. $4) – 2$ Valency shown by $C$(atomic no. $8) – 2$ Valency shown by $D$(atomic no. $10) – 0$ Valency shown by E(atomic no. $13) – 3$

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 "Que-Ans (Each of 2 Mark )" from Structure of the Atom→Structure of the Atom — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

A car accelerates from 6ms-1 to 16ms-1 in 10sec. Calculate:
The distance covered by the car in that time.
→
What is the utility of tissues in multi-cellular organisms?
→
If the time taken to bring a ball to rest from a certain velocity v is reduced to half, then what will be the changes in the values. Change of momentum?
→
A lamp consumes $1000J$ of electrical energy in $10s.$ What is its power$?$
→
How are high yielding breeds of poultry advantageous over indigenous breeds?
→
What is an epidemic disease?
→
Name that group of organisms which does not fit neatly into any scheme of classification.
→
What kind of energy transformations takes place at a coal-based thermal power station?
→
The volume of $50\ g$ of a substance is $20\ cm^3$. If the density of water is $1\ g\ cm ^{-3}$, will the substance float or sink$?$
→
Is it possible to see atoms these days? Explain your answer.
→