Welcome to your Grade 11 Chemistry chapter 1
After carefully reading the following 30 questions, choose the correct answer.
1.
Which Greek philosopher suggested that matter is composed of tiny, indestructible particles called "atomos"?
2.
In what year did John Dalton develop an atomic theory that gained broad acceptance?
3.
According to the law of definite proportions, what is the constant mass percentage of hydrogen in water?
4.
Which physicist showed in 1932 that penetrating radiation from beryllium consists of neutral particles called neutrons?
5.
What is the approximate mass of a neutron compared to the mass of an electron?
6.
The speed of light (c) is approximately equal to which value?
7.
Which constant has the value 6.63 x 10^-34 J.s?
8.
According to the Bohr model, what happens when an electron falls from a higher energy level to a lower one?
9.
Which quantum number is designated by the letter "l" and determines the shape of the orbital?
10.
What is the shape of an atomic orbital where the angular momentum quantum number (l) is 0?
11.
Which principle states that no two electrons in the same atom may have identical sets of four quantum numbers?
12.
Which rule states that each orbital of a given subshell is occupied by a single electron before pairing begins?
13.
In the modern periodic table, elements are arranged according to increasing:
14.
Which group of elements is placed separately at the bottom of the periodic table?
15.
Which principle is a guide for predicting the order in which electrons fill subshells and shells?
16.
What is the term for the spectrum associated with the emission of light resulting from electron transitions to lower energy states?
17.
How many values of m_l occur in a subshell labeled "p"?
18.
Which property is defined as the distance between identical points on successive waves?
19.
Which term describes a region in an atom with a high probability of containing an electron?
20.
What is the value of the principal quantum number "n" for the outermost shell of an element in Period 3?
21.
Which of the following is NOT one of the three principal types of radiation emitted by radioactive substances?
22.
The equation E = hν is used to calculate the energy of:
23.
Which scientist's experiment with thin metal foils led to the concept of the nuclear atom?
24.
When n = 2, what are the possible values of the angular momentum quantum number "l"?
25.
What is the letter label for a subshell where the angular momentum quantum number "l" is 1?
26.
Which phenomenon is defined as the emission of an electron from a metal surface caused by electromagnetic radiation of a minimum energy?
27.
How many orbitals occur within a subshell labeled "f"?
28.
Which property in the periodic table generally increases across a period and decreases down a group?
29.
What is the term for atoms of the same element that have different numbers of neutrons?
30.
The "dumbbell" shape is characteristic of which type of orbital?
31.
Which scientist's experiment established the mass-to-charge ratio of the electron?
