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Questions and Answers
What is the chemical symbol for copper?
What is the chemical symbol for copper?
- CO
- Co
- Cr
- Cu (correct)
An isotope of carbon has 6 protons and 8 neutrons. What is its atomic mass in atomic mass units (amu)?
An isotope of carbon has 6 protons and 8 neutrons. What is its atomic mass in atomic mass units (amu)?
- 6 amu
- 14 amu (correct)
- 2 amu
- 8 amu
A group of atoms carrying a fixed charge is called what?
A group of atoms carrying a fixed charge is called what?
- Cation
- Anion
- Ion (correct)
- Polyatomic ion
What is the order of magnitude of the typical radii of atoms?
What is the order of magnitude of the typical radii of atoms?
Which scientist is credited with proposing the law of constant proportion?
Which scientist is credited with proposing the law of constant proportion?
What is the formula unit mass of $Ca_3(PO_4)_2$?
What is the formula unit mass of $Ca_3(PO_4)_2$?
What type of compound is typically formed when a metal reacts with a non-metal?
What type of compound is typically formed when a metal reacts with a non-metal?
A force of 10N is applied to an object causing it to move 5m. How much work is done?
A force of 10N is applied to an object causing it to move 5m. How much work is done?
A car accelerates from rest to a speed of 20 m/s in 4 seconds. How much work is done on the car?
A car accelerates from rest to a speed of 20 m/s in 4 seconds. How much work is done on the car?
What is the energy possessed by an object due to its motion called?
What is the energy possessed by an object due to its motion called?
What is the rate at which work is done or energy is transferred called?
What is the rate at which work is done or energy is transferred called?
Which sequence correctly describes the energy changes that occur when a battery lights a bulb?
Which sequence correctly describes the energy changes that occur when a battery lights a bulb?
What is the approximate speed of sound in air at room temperature?
What is the approximate speed of sound in air at room temperature?
What is a portion of a medium where the density is higher than its average value called?
What is a portion of a medium where the density is higher than its average value called?
Very sharp and loud sounds produced by pressure variation associated with shock waves are called:
Very sharp and loud sounds produced by pressure variation associated with shock waves are called:
Which of the following describes a stable atom?
Which of the following describes a stable atom?
If a force of 20 N is applied to an object, and it moves 5 meters, how much work is done?
If a force of 20 N is applied to an object, and it moves 5 meters, how much work is done?
Which form of energy is associated with the internal motion of atoms and molecules?
Which form of energy is associated with the internal motion of atoms and molecules?
How would you best describe a 'rarefaction' in the context of sound waves?
How would you best describe a 'rarefaction' in the context of sound waves?
What distinguishes a sonic boom from ordinary sound?
What distinguishes a sonic boom from ordinary sound?
Consider a scenario where a moving object collides with a stationary object and transfers energy. Which type of energy transfer is most dominant during this collision?
Consider a scenario where a moving object collides with a stationary object and transfers energy. Which type of energy transfer is most dominant during this collision?
If the atomic number of an element is 6 and its mass number is 14, how many neutrons are present in the nucleus of its atom?
If the atomic number of an element is 6 and its mass number is 14, how many neutrons are present in the nucleus of its atom?
What is the electrical charge of an anion?
What is the electrical charge of an anion?
How would decreasing the density of air affect the speed of sound?
How would decreasing the density of air affect the speed of sound?
Which of the following best describes the law of constant proportions?
Which of the following best describes the law of constant proportions?
Predict which process would lead to the formation of an ionic compound?
Predict which process would lead to the formation of an ionic compound?
Which form of energy contributes to global warming the most?
Which form of energy contributes to global warming the most?
Sound travels in what type of waves?
Sound travels in what type of waves?
What type of electromagnetic energy causes sunburn?
What type of electromagnetic energy causes sunburn?
If you heat up two beakers of water to different temperatures, what is primarily different in them?
If you heat up two beakers of water to different temperatures, what is primarily different in them?
What is required for work to be done on a system?
What is required for work to be done on a system?
What force/energy, must an object have to be perceived?
What force/energy, must an object have to be perceived?
If all matter has electromagnetic energy, why can light only pass through certain objects?
If all matter has electromagnetic energy, why can light only pass through certain objects?
Flashcards
Chemical symbol for copper
Chemical symbol for copper
The chemical symbol for copper is Cu.
Atomic mass
Atomic mass
The atomic mass is the total number of protons and neutrons in an atom's nucleus.
Ion
Ion
A group of atoms carrying a fixed charge.
Atomic radii order
Atomic radii order
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Law of constant proportion
Law of constant proportion
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Constant proportion proposer
Constant proportion proposer
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Formula unit mass of Ca3(PO4)2
Formula unit mass of Ca3(PO4)2
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Ionic compound formation
Ionic compound formation
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Power
Power
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Battery energy transformation
Battery energy transformation
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Speed of sound in air
Speed of sound in air
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Compression
Compression
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Sonic boom
Sonic boom
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Kinetic energy
Kinetic energy
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Study Notes
- The chemical symbol for copper is Cu.
- The atomic mass of an isotope of carbon with 6 protons and 8 neutrons is 14 amu.
- A group of atoms carrying a fixed charge on them is called an ion.
- The radii of atoms are of the order 10^-10m.
- The law of constant proportion was put forward by J. L. Proust.
- The formula unit mass of Ca3(PO4)2 is 310g.
- An ionic compound is formed when a metal reacts with a non-metal.
- A force of 100N applied to an object that moves 5m results in work done. The work done is 500J.
- When a car accelerates from rest to a speed of 20m/s in 4 seconds, the work done on the car is 1600J.
- The energy possessed by an object due to its motion is called kinetic energy.
- The rate at which work is done or energy is transferred is called power.
- In a battery lighting a bulb, the correct way of energy changes is chemical energy converted to electrical energy then to light energy.
- The speed of sound in air at room temperature approximately 330 m/s.
- A portion of a medium where the density has a larger value than its average value is called compression.
- A very sharp and loud sound produced by pressure variation associated with shock waves is a sonic boom.
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