Welcome to your Grade 11 Physics chapter 7
After carefully reading the following 30 questions, choose the correct answer.
1.
Which scientist proposed the "plum pudding" model of the atom?
2.
In the Rutherford gold foil experiment, why did most alpha particles pass straight through the foil?
3.
What is the term for the number of protons in the nucleus of an atom?
4.
Atoms with the same atomic number but different mass numbers are called:
5.
Which force holds the protons and neutrons together in the nucleus?
6.
What is the approximate radius of a nucleus with mass number A?
7.
The difference between the mass of a nucleus and the sum of the masses of its nucleons is the:
8.
Which radiation consists of helium nuclei?
9.
What happens to the atomic number (Z) during alpha decay?
10.
Which type of radioactive decay involves the emission of a high-energy electron?
11.
The time required for half of the radioactive nuclei in a sample to decay is the:
12.
What is the SI unit of radioactivity?
13.
Which process involves splitting a heavy nucleus into two lighter nuclei?
14.
What is the main source of energy in stars like the Sun?
15.
Which device is used to detect and measure ionizing radiation?
16.
In the Bohr model, an electron radiates energy only when it:
17.
What is the charge of a neutron?
18.
Which particle is equivalent to a beta plus (β⁺) particle?
19.
Radioactive carbon-14 is commonly used for:
20.
Which radiation has the highest penetrating power?
21.
The energy equivalent of mass is given by Einstein's equation:
23.
During beta minus decay, a neutron in the nucleus turns into a proton and:
24.
Which quantity is conserved in all nuclear reactions?
25.
What type of nuclear reactor is primarily used for producing isotopes?
26.
Which of the following is a risk associated with high doses of radiation?
27.
In nuclear physics, 1 amu (atomic mass unit) is defined relative to:
28.
What is the purpose of control rods in a nuclear fission reactor?
29.
Beta plus decay occurs when there are:
30.
Gamma radiation emission results in:
