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Science 2.7 Isotopes and Compounds

Horizontales
Specific ratio of elements in every compound
When two or more atoms combine
Molecules that combine with other molecules form this
First to interact and decide how an atom will react in a chemical reaction
Formed when electrons from two different atoms pair up
Verticales
Area around the nucleus that contains a specific number of electrons
The simplest form of molecular model containing only two atoms
Outer electron shell of an atom
The number of protons is equal to the number of electrons in this type of element
Atoms of the same element that have a different number of neutrons