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Chapter 4 Science Key Terms

Author: Jeanne Berube
Across
The average mass of all the isotopes of an element.
Horizontal rows,
An element that lacks the properties of a metal.
Consists of high energy waves, similar to X-rays.
Elements in Group17 "salt forming"
Consists of two atoms
The ability of an object to transfer heat or electricity into another object.
Vertical columns.
Down
A material that can be hammered or rolled into flat sheets.
Consists of two protons and two neutrons and is positively charged.
The elements in Group18.
Substances that can conduct electricity under some conditions but not under other conditions.
Smallest particle of an element.
The sum of the protons and neutrons in the nucleus of an atom.
A material that can be pulled out, or drawn into a long wire.