1800-150-456-789
FlagBACK
Flag 9 grade science> 8. Helium atom has an atomic mass of 4u a...
question mark

8. Helium atom has an atomic mass of 4u and two protons in its nucleus. How many neutrons does it have?

Harshit Singh , 3 Years ago
Grade 12th pass
anser 1 Answers
Pawan Prajapati

Last Activity: 3 Years ago

Atomic mass = number of (protons + neutrons) 4 = 2 + number of neutrons Number of neutrons = 4 – 2 = 2 Therefore, helium has 2 neutrons.

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

Other Related Questions on 9 grade science

question mark
a car travels half distance with the speed of 20m/s and next half distance travel with 30 m/s , the average speed of the car is
9 grade science
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
A hockey ball of mass 200g travelling from west to east at 10m//s is struck by a hockey stick. As a result, the ball gets turned back and now has a speed of 5m//s. If the ball and hockey stick were in contact for 0.2s, Calculate (i) initial and final momentum of the ball (ii) rate of change of momentum of the balll (iii) force exerted by hockey stick on the ball.
9 grade science
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
Which step is not involved in the carbon-cycle ?
9 grade science
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
Draw a neat labelled diagram of a vernier callipers.
9 grade science
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
Why are lead compounds are added to petrol? How is it harmful?
9 grade science
1 Answer Available

Last Activity: 2 Year ago(s)