Set 7 7th grade Science

a movie

a pure substance

a mixed substance

a toxic substance

letters of the alphabet in a sentence

chemicals that save people

letters for elements

numbers for elements

largest part of an element

part of a nuetron

part of an electron

smallest part of an element

written form of compounds

written form of numbers

written form of letters

written form of atoms

 $H_2O$  

 $H_1N_1$  

C-H-O

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inside the nucleus-positive charge

inside the nucleus-negative charge

inside the nucleus-negative and positive charge

inside the nucleus-nuetral charge

inside the nucleus-negative charge

inside the nucleus-triple charge

inside the nucleus-no charge

inside the nucleus-double charge

inside the nucleus-crazy charge

inside the nucleus- positive charge

inside the nucleus-no charge

inside the nucleus-negative charge