LRA 211 REVIEW QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
||UPDATED 2025
1. Amplitude is the:
Answer: ✔✔ Width of a waveform
Solution:
Amplitude refers to the height or intensity of a wave. In the context of x-
rays or other electromagnetic radiation, it can represent the strength or
energy of the wave. The amplitude of a waveform typically affects the
intensity or brightness of the radiation. A higher amplitude generally
corresponds to more energy and a stronger signal.
2. An atom is the:
Answer: ✔✔ Smallest particle of an element that cannot be divided or
broken by chemical means
Solution:
An atom is the basic unit of an element and consists of a nucleus (made up
of protons and neutrons) surrounded by electrons. It cannot be broken down
into simpler substances by chemical means. The number of protons in the
nucleus determines the identity of the atom (and thus the element).
3. Atomic mass number (A) is the:
Answer: ✔✔ Number of protons plus number of neutrons in the nucleus
Solution:
The atomic mass number (or mass number) is the total number of protons
and neutrons in an atom's nucleus. This number gives an indication of the
atom's mass. For example, a carbon-12 atom has 6 protons and 6 neutrons,
so its atomic mass number is 12.
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
||UPDATED 2025
1. Amplitude is the:
Answer: ✔✔ Width of a waveform
Solution:
Amplitude refers to the height or intensity of a wave. In the context of x-
rays or other electromagnetic radiation, it can represent the strength or
energy of the wave. The amplitude of a waveform typically affects the
intensity or brightness of the radiation. A higher amplitude generally
corresponds to more energy and a stronger signal.
2. An atom is the:
Answer: ✔✔ Smallest particle of an element that cannot be divided or
broken by chemical means
Solution:
An atom is the basic unit of an element and consists of a nucleus (made up
of protons and neutrons) surrounded by electrons. It cannot be broken down
into simpler substances by chemical means. The number of protons in the
nucleus determines the identity of the atom (and thus the element).
3. Atomic mass number (A) is the:
Answer: ✔✔ Number of protons plus number of neutrons in the nucleus
Solution:
The atomic mass number (or mass number) is the total number of protons
and neutrons in an atom's nucleus. This number gives an indication of the
atom's mass. For example, a carbon-12 atom has 6 protons and 6 neutrons,
so its atomic mass number is 12.
