Subatomic Particles
Subatomic particles are the particles that make up atoms. There are three main types of 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 positive charge of +1.
Neutrons
Neutrons are neutral particles found in the nucleus of an atom. They have a relative mass of 1 and no electric charge.
Electrons
Electrons are negatively charged particles that orbit the nucleus of an atom. They have a relative mass of approximately 1/1836 and a negative charge of -1.
Study Guide
- What are the three main types of subatomic particles?
- Where are protons located in an atom?
- What is the charge and relative mass of a neutron?
- How is the charge of an electron different from that of a proton?
- Which subatomic particles are found in the nucleus of an atom?
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Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
Ecosystems: Interactions, Energy, and Dynamics
Obtain information from literature and other media to illustrate that there are many different kinds of living things and that they exist in different places on land and in water (e.g., woodland, tundra, desert, rainforest, ocean, river).
EARTH AND SPACE SCIENCE
Earth’s Systems
Make observations from media to obtain information about Earth’s events that happen over a short period of time (e.g., tornados, volcanic explosions, earthquakes) or over a time period longer than one can observe (e.g., erosion of rocks, melting of glaciers).
Collect and evaluate data to identify water found on Earth and determine whether it is a solid or a liquid (e.g., glaciers as solid forms of water; oceans, lakes, rivers, streams as liquid forms of water).