Across
- These elements include fluorine, chlorine, bromine, iodine, and astatine
- The lightest element
- Heaviest of the naturally occurring elements, U
- Different forms of the same element
- Its symbol is Fe
- ____ signs, Ne
- This element helps make strong bones, Ca
- Hydrogen, carbon, nitrogen, oxygen, sulfur
- States or ___ of matter include solid, liquid, and gas
- Substance that consists of a single type of atom
- The ____ number or number of protons in an atom
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Down
- ___ metals include gold, iron, nickel, and copper
- Alkaline ____ metals are in the second column of the periodic table
- neon, helium, argon, krypton, xenon, radon
- Most common element in the air we breathe, N
- The ____ table is a listing of the elements
- Its symbol is Au
- A basic element for life, C
- Planet, messenger of the Greek gods, element with symbol Hg
- Its used in nuclear reactors, Pu
- Element worth five cents, Ni
- _____ metals include sodium, potassium, and lithium
- Element known as good conductor of electricity, Cu
- The majority of elements are ____, these types of elements are good conductors
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