Subatomic Particles
Subatomic particles are the particles that make up atoms. Atoms are the basic building blocks of matter, and they are made up of three main subatomic particles: protons, neutrons, and electrons.
Protons
Protons are positively charged particles found in the nucleus of an atom. They have a relative mass of 1 and a charge of +1.
Neutrons
Neutrons are neutral particles found in the nucleus of an atom. They have a relative mass of 1 and no charge (neutral).
Electrons
Electrons are negatively charged particles that orbit the nucleus of an atom in specific energy levels. They have a relative mass of nearly 0 and a charge of -1.
Study Guide
- What are the three main subatomic particles?
- Where are protons found in an atom?
- What is the charge of a proton?
- Where are neutrons found in an atom?
- What is the charge of a neutron?
- Where are electrons found in an atom?
- What is the charge of an electron?
- What are the relative masses of protons, neutrons, and electrons?
- What are the main components of an atom?
[Subatomic] Related Worksheets and Study Guides:
.◂Science Worksheets and Study Guides Third Grade. Relationships among living things
Study Guide
Relationships among living things 
Activity Lesson
Relationships Among Living Things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Vocabulary/Answer key
Relationships among living things Vocabulary/Answer key
Relationships among living things
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
From Molecules to Organisms: Structures and Processes
Create representations to explain the unique and diverse life cycles of organisms other than humans (e.g., flowering plants, frogs, butterflies), including commonalities such as birth, growth, reproduction, and death.
Unity and Diversity
Construct an argument from evidence to explain the likelihood of an organism’s ability to survive when compared to the resources in a certain habitat (e.g., freshwater organisms survive well, less well, or not at all in saltwater; desert organisms survive well, less well, or not at all in woodlands).
Create models that illustrate how organisms and their habitats make up a system in which the parts depend on each other.