LRA 211-WEEK 1 CHAPTER 2,3,5
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS RATED A+
1. The 3 fundamental components of an atom are?
Answer: ✔✔ Proton, neutron, electron
Explanation:
The three fundamental components of an atom are:
o Protons: Positively charged particles in the nucleus.
o Neutrons: Neutral particles with no charge, also located in the
nucleus.
o Electrons: Negatively charged particles that orbit the nucleus.
2. The atomic nucleus contains:
Answer: ✔✔ Protons and neutrons, most of the mass of an atom
Explanation:
The atomic nucleus contains protons (which are positively charged) and
neutrons (which are neutral). Together, they make up most of the atom's
mass. Electrons, which are much lighter, orbit around the nucleus but
contribute very little to the atom's mass.
3. The earliest atomic theory based on an arrangement similar to the solar
system is attributed to:
Answer: ✔✔ Ernest Rutherford
Explanation:
Ernest Rutherford is credited with proposing a model of the atom that
resembles the solar system, with electrons orbiting a central, dense nucleus.
His atomic model was developed after his gold foil experiment in 1911,
which led to the discovery of the nucleus.
, 4. The component of the nucleus that has a positive charge and mass is the:
Answer: ✔✔ Proton
Explanation:
Protons are the positively charged particles found in the nucleus of an atom.
They carry a significant amount of mass and, along with neutrons, make up
most of the atom's mass.
5. The component of the nucleus that has a negative charge is the:
Answer: ✔✔ Electron
Explanation:
Electrons are the negatively charged particles that orbit the nucleus. Though
they have much less mass than protons or neutrons, their negative charge
plays a key role in chemical bonding and interactions.
6. The electron shell closest to the nucleus is lettered:
Answer: ✔✔ K
Explanation:
The electron shells or energy levels around the nucleus are designated by
the letters K, L, M, N, etc. The K-shell is the closest shell to the nucleus and
can hold a maximum of 2 electrons. It has the highest energy level when
compared to the shells farther from the nucleus.
As the wave's frequency increases, the wavelength -ANSWER✔✔decreases
Frequency is typically measured in -ANSWER✔✔Hertz (Hz)-One hertz is defined
as one cycle per second
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS RATED A+
1. The 3 fundamental components of an atom are?
Answer: ✔✔ Proton, neutron, electron
Explanation:
The three fundamental components of an atom are:
o Protons: Positively charged particles in the nucleus.
o Neutrons: Neutral particles with no charge, also located in the
nucleus.
o Electrons: Negatively charged particles that orbit the nucleus.
2. The atomic nucleus contains:
Answer: ✔✔ Protons and neutrons, most of the mass of an atom
Explanation:
The atomic nucleus contains protons (which are positively charged) and
neutrons (which are neutral). Together, they make up most of the atom's
mass. Electrons, which are much lighter, orbit around the nucleus but
contribute very little to the atom's mass.
3. The earliest atomic theory based on an arrangement similar to the solar
system is attributed to:
Answer: ✔✔ Ernest Rutherford
Explanation:
Ernest Rutherford is credited with proposing a model of the atom that
resembles the solar system, with electrons orbiting a central, dense nucleus.
His atomic model was developed after his gold foil experiment in 1911,
which led to the discovery of the nucleus.
, 4. The component of the nucleus that has a positive charge and mass is the:
Answer: ✔✔ Proton
Explanation:
Protons are the positively charged particles found in the nucleus of an atom.
They carry a significant amount of mass and, along with neutrons, make up
most of the atom's mass.
5. The component of the nucleus that has a negative charge is the:
Answer: ✔✔ Electron
Explanation:
Electrons are the negatively charged particles that orbit the nucleus. Though
they have much less mass than protons or neutrons, their negative charge
plays a key role in chemical bonding and interactions.
6. The electron shell closest to the nucleus is lettered:
Answer: ✔✔ K
Explanation:
The electron shells or energy levels around the nucleus are designated by
the letters K, L, M, N, etc. The K-shell is the closest shell to the nucleus and
can hold a maximum of 2 electrons. It has the highest energy level when
compared to the shells farther from the nucleus.
As the wave's frequency increases, the wavelength -ANSWER✔✔decreases
Frequency is typically measured in -ANSWER✔✔Hertz (Hz)-One hertz is defined
as one cycle per second
