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chapter 2.2 review

atoms/ matter

Protons and neutrons are in the ________ of the atom nucleus
The nucleus has a ________ _____ positive charge
The nucleus has the ______ of the atom most mass
The atomic number is the number of______ in the nucleus of an atom protons
A electron has _______ charge negative
The modern model of an atom is called the _______ model electron-cloud
You can identify an element if you know its atomic number or_____ protons
Electrons that are close the the nucleus have _______than electrons that are farther from the nucleus less energy
Isotopes have the same number of protons but different numbers of _______ electrons
Ion has a charge because it has gained or lost _____ electrons
A ________ ion has more protons than electrons postive
Adding a ______ to a neutral atom produce a new element proton
A thing that is composed of two or more separate elements compound
Building block of life atom
substance made of only one kind of atom element
Anything that takes up space and has a mass matter
A mixture in which two or more substance are evenly mixed but not bonded together homogeneous mixture
A mixture in which the substance are not evenly mixed heterogeneous mixture
Two or more atom that are held together by chemical bonds and act as a unit molecule
Matter with a composition that is always the same substance
Created by: greenari6457