Show:
Atomic Structure
Nucleus
Alpha scattering
Isotopes
Nuclear reactions
100

What are the three main subatomic particles in an atom?

Protons, neutrons and electrons

100

What is the central part of an atom called?

nucleus

100

What is the charge of an alpha particle?

+2

100

Define isotopes.

Atoms with the same number of protons but different numbers of neutrons

100

What is nuclear fission?

splitting if a heavy unstable nucleus 

200

Which subatomic particle has a relative charge of −1?

electrons

200

What comes once in a minute, twice in a moment, but never in a thousand years?

M

200

What happened to most alpha particles when they passed through the foil?

they went undeviated

200

Carbon-12 and carbon-14 have the same number of which subatomic particles?

protons

200

what is nuclear fusion

combining of two lighter nuclei
300

Which particles are found inside the nucleus?


protons and neutrons

300

what is meant by nucleon number

the total number of protons and neutrons in an atom

300

Why were some alpha particles deflected through large angles?


because the nucleus is positively charged

300

During which month do people sleep the least?

February

300

which nuclear process release energy in stars

fission

400

An atom contains 11 protons, 12 neutrons and 11 electrons. What is its mass number?

23

400

147N represents the nitrogen atom. state the number of protons, electrons and neutrons in it

P - 7

e - 7

n -7

400

What conclusion did Rutherford make when a very small number of alpha particles bounced back?

the nucleus is too small and dense

400

examples of isotopes of any element

any correct annswer

400

nuclear reactor works with which nuclear reaction

fission

500

What word is always spelled wrong in the dictionary?

wrong

500

what is binding energy

the energy which hold the particles in the nucleus 

OR 

Nuclear binding energy is the energy required to separate a nucleus completely into its individual protons and neutrons.

500

True or False

Mathew is very interested to study physics

its a free 500 mark

500

Explain why isotopes of the same element have the same chemical properties.

they have same number of electrons 

500

State the reason..

why Kailash always feels sleepy during physics lesson

its a free mark - but not 500 only 300