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Exam 1: The Atom

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Question 1

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A(n) ______________ is a solid piece of pure material.

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Question 2

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Why are valence electrons of primary interest in electricity?

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Valence electrons are of prima...

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The Law of Charges states: _________ charges attract and unlike charges repel.

Light has both wave and _____________ characteristics.

When electrons break free from orbit around the nucleus, they are called free electricity.

There are three major types of particles that make up an atom: electrons, protons, and ______________________.

What are the three categories of materials used in electricity?

Semiconductors have many free electrons and allow current to flow easily.

What is electric current?

A(n) ________________ is the smallest part of an element that still has the characteristics of the element.

Atoms are the basic building blocks that make up all matter.

The orbit farthest from the nucleus contains the ____________ electrons.

Photons are the basic unit of light energy.

Describe the charge of protons, electrons, and neutrons as well as their location with an atom.

An atom has an equal number of protons and electrons.