Nuclear Physics: Crash Course Physics #45

How many types of particle are atoms made of?

• 2

• 1

• 4

• 3

What is the number of protons in an atom usually called?

• Mass Number

• Electrons

• Nucleus

• Atomic Number

What is the formula for finding mass number? Explain your answer!

What is the name of atoms when they have same atomic number (protons) but different mass number (protons + neutrons)?

• Isotopes

• Rare elements

• Carbon atoms

• Nuclei

Why helium atoms are lighter than its component ( 2 Hydrogen atoms)?

• Because electrons number change

• Because helium atoms and hydrogen atoms are different

• Because mass difference is converted into energy

• Because the speed of light in Einstein equation

What is the cause of radioactivity?

• Unstable nucleus of atoms

• Uranium

• High number of neutrons

• Number of electrons

What does alpha particles consists of?

• 2 protons and 2 neutrons

• 3 protons and 3 neutrons

• 1 proton and 1 neutron

• 1  proton

What is beta particle made of?

• Electrons

• Neutrinos

• Protons

• Neutrons

What is released in gamma decay?

• Neutrons

• Photons

• Protons

• Electrons

Mention three types of radioactive decay!