Podcast
Questions and Answers
Which subatomic particle has a negative charge?
Which subatomic particle has a negative charge?
- Proton
- Positron
- Electron (correct)
- Neutron
What is the chemical symbol for sodium?
What is the chemical symbol for sodium?
- Na (correct)
- No
- Sa
- So
What is the formula for calculating the density of a substance?
What is the formula for calculating the density of a substance?
- $mass - volume$
- $mass + volume$
- $\frac{mass}{volume}$ (correct)
- $mass \times volume$
Which of the following is an example of a chemical change?
Which of the following is an example of a chemical change?
Which of the following best describes a radical in chemistry?
Which of the following best describes a radical in chemistry?
What is the role of acids and bases in chemical reactions?
What is the role of acids and bases in chemical reactions?
What is the fundamental difference between an atom and a molecule?
What is the fundamental difference between an atom and a molecule?
Flashcards
Subatomic particle with a negative charge
Subatomic particle with a negative charge
Electron
Sodium chemical symbol
Sodium chemical symbol
Na
Density formula
Density formula
mass/volume
Example of a chemical change
Example of a chemical change
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Radical in chemistry
Radical in chemistry
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Acids and bases role
Acids and bases role
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Atom vs. molecule
Atom vs. molecule
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Subatomic Particle
Subatomic Particle
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Chemical Change
Chemical Change
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Periodic Table
Periodic Table
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Study Notes
Subatomic Particles
- Electrons are the subatomic particles that have a negative charge.
Sodium
- The chemical symbol for sodium is Na.
Density Calculation
- Density can be calculated using the formula: Density = Mass/Volume.
Chemical Change
- A chemical change involves the transformation of substances, resulting in new chemical compounds. Examples include combustion, rusting, and fermentation.
Radicals in Chemistry
- A radical is an atom or molecule that has unpaired electrons, making it highly reactive and unstable.
Role of Acids and Bases
- Acids donate protons (H⁺ ions) in chemical reactions, while bases accept protons. They play crucial roles in pH regulation, neutralization reactions, and various biochemical processes.
Atoms vs. Molecules
- The fundamental difference between an atom and a molecule is that an atom is the smallest unit of an element, while a molecule consists of two or more atoms bonded together, representing the smallest unit of a compound.
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Description
Test your knowledge of basic chemistry concepts with this Class 7 quiz. Answer questions about subatomic particles, density calculation, chemical symbols, and identifying chemical changes.
