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Williamsburg High School for Architecture and Design

Redefining Career & Technical Education in New York City Since 2009

You are here: Home / Teacher Posts / Unit 2, Day 2: The Nucleus Part 1

Unit 2, Day 2: The Nucleus Part 1

September 18, 2013 By Ms. Bruno

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Today we broke down the structure of an atom by talking about the nucleus.  We learned that protons in the nucleus repel each other because they are positively charged, and the neutrons keep them together.

Aim: How is the nucleus of an atom organized?

Answer: The nucleus is composed of protons and neutrons.  The number of protons determines the atomic number and therefore the properties of the nucleus.  Nuclei can have different numbers of neutrons.  We call these atoms with the same atomic numbers and different numbers of neutrons isotopes.

Some periods also learned about natural abundance and average masses.  Most atoms have multiple isotopes that exist in nature, and if we measure a population of these atoms, we will get some of the isotopes as well and that will change our mass reading for that element.  If you didn’t get to it this week, don’t worry!  We’ll talk about it on Monday.

Presentation: [gview file=”https://www.whsad.org/wp-content/uploads/2013/09/Unit-2-Lesson-2.pdf”]

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About Ms. Bruno

Ms. Bruno has been an Assistant Principal at Williamsburg High School for Architecture and Design since 2009. She oversees the departments of Science, Mathematics, Architecture and Design (Career and Technical Education (CTE)), Physical Education and Health. She can be reached at 718-388-1260 ext. 2080, or bruno@whsad.org.

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