test 1
test 2
test 3
100
This positively charged particle was discovered by Ernest Rutherford.
Who discovered protons?
100
The subatomic particle with no charge on it
neutron
100
He is known as the father of nuclear physics
who is Ernest Rutherford?
200
In the above figure, Element Y is added to element X. This makes it stronger, durable and hard to shift. what is this resultant structure/ process called?
it is called an alloy/ alloying
200
Double Jeopardy!
double points to be added
200
what is the range on the pH scale?
range is 0-14
300
which model of the atom is represented here?
Plum pudding model
300
Neutral doublet was proposed by which scientist?
Ernest Rutherford
300
What are some reasons for choosing aluminium in a lot of daily use items like air planes, cooking vessels, bicycle bodies
it is durable
lightweight
malleable
stronger than a lot of metals and lightweight
400
What is an element?
a substance that is made up of just one type of materials/ atoms. has the same chemical composition throughout
400
List any three postulates/ statements from Dalton
atoms are indivisible
elements combine in whole numbers to form compounds
atoms of same elements have same properties
400
Paul Villard and Ernest Rutherford discovered these three rays while conducting experiments.
alpha particles, beta particles and gamma rays
500
This gas when passed through limewater, turn it milky. Which gas is it??
carbon dioxide
500
what is the % purity of 20K gold? ( you know the formula)
20/24x100=83.33%
500
In the image given above:
what does the blue box represent?
The gray circle is the ..............
The yellow sheet is the ....................
blue box: alpha particle source/ emitter
gray circle: detector screen/ fluorescent screen
yellow sheet- gold foil