12 Questions
Which subatomic particle has a positive charge?
Protons
What is the smallest unit of matter?
Electrons
All atoms of the same element have the same mass.
False
What is the basic unit that makes up a compound?
Atoms
An atom is the smallest unit of matter.
True
Describe the structure of an atom at a basic level.
An atom consists of a nucleus containing protons and neutrons, with electrons orbiting around the nucleus.
What is the significance of the atomic number of an element?
The atomic number of an element represents the number of protons in the nucleus of an atom of that element.
Protons and neutrons are located in the nucleus of an atom.
True
Explain the concept of isotopes in relation to atoms.
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons, leading to variations in atomic mass.
______ are made up of protons, neutrons, and electrons
Atoms
An element is determined by the number of ______ in its nucleus
Protons
The ______ of an element is the average mass of its isotopes
Atomic mass
Study Notes
Subatomic Particles
- Protons have a positive charge.
Atomic Structure
- An atom is the smallest unit of matter.
- At a basic level, the structure of an atom consists of protons and neutrons located in the nucleus, surrounded by electrons.
Elements and Isotopes
- All atoms of the same element have the same atomic number, which determines the element.
- Isotopes of an element have the same atomic number but differ in their atomic mass due to varying numbers of neutrons in the nucleus.
- The atomic mass of an element is the average mass of its isotopes.
Compounds and Atomic Units
- Atoms are the basic units that make up a compound.
- Atomic units are made up of protons, neutrons, and electrons.
Test your knowledge about atoms and matter with this quiz. Answer questions about the smallest unit of matter, subatomic particles, and compounds.
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