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Physics Chapters 17-20

Across
Substances slightly attracted by a magnetic field
Used in disinfecting wounds
A part of the electromagnetic force
Diamonds and charcoal
Listed on the side of food packages
Arrangement of elements according to number of protons
Element used in bright store signs
Negative charge
Holds the nucleus of an atom together
Light gas used in balloons
Radioactive gas that can be poisonous
Down
Chief component in steel
No charge
Chief component in steel
Substances that have a weak response to magnets
Black rock made of iron and oxygen:used to make most magnets
Metals strongly attracted to magnetite
Smallest stable form of matter
Number of protons in an element
Positive charge
Gas in air that humans need to live
Pure form of matter made of one single type of atom