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9 - Module 3 TEST

TermDefinition
atomic mass MINUS atomic number How do you find the number of neutrons?
Atomic mass the average mass of a typical atom of that element
Atomic number the number of protons an atom contains
Atoms smallest unit of matter
electron cloud Where are electrons located?
Electron negatively charged particles with almost no mass
Elements one type of atom
inside the nucleus Where are protons and neutrons located?
Ion a charged atom
Isotopes atoms of the same element that have a different number of neutrons
negative What is the charge of an electron?
net charge positive What is the charge of the nucleus?
neutral What is the charge of a neutron?
Neutrons electrically neutral particles, which means they have no charge
Nucleus the center of an atom, formed by protons and neutrons
positive What is the charge of a proton?
protons PLUS neutrons How do you find the atomic mass?
Protons positively charged particles
same as atomic number How do you find the number of protons?
same as protons in a neutral atom How do you find the number of electrons?
Subatomic particles Particles found within the atom, mainly protons, neutrons, and electrons.
smaller The mass of an electron is more than 1800 times ___________ than the mass of a proton.
positive electric charge The nucleus of an atom has a _______________
True The nucleus is made of protons and neutrons and has a positive charge.
False All isotopes are radioactive
Created by: Ms. Greenup
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