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Chapter 1 reveiw

has to do with atoms and matter

QuestionAnswer
Atoms have a central region called... Nucleus
Nucleus contains particles called the _____ and ______. Proton and Neutron
Same number as the protons. Atomic number
Atoms have a region surrounding the central area called the _____. Electron cloud
Atoms that have gained or lost electrons become _______. Ions
Ions which have a positive or negative ________. Charge
Positively charged particle in the nucleus of an atom... Proton
Region surrounding an atom's nucleus where one or more electrons are often found... Electron cloud
Negatively charged particle that occupies the space in an atom outside the nucleus... Electron
One or more atoms of an element having the same number of protons but a different number of neutrons... Isotope
Region at the center of an atom that contains most of the mass of an atom Nucleus
An atom that has a charge because It has gained or lost electrons... Ion
The number of protons in the nucleus of an atom of an element... Atomic number
Uncharged particle in the nucleus of an atom... Neutron
The nucleus of an atom contains _______ and neutrons. Protons
The nucleus has a _______ charge and the ______ mass of the atom. Positive, Most
An electron is a ________ charged particle located outside the nucleus. Negatively
The modern model of an atom is called the ______ model. Electron-cloud
Electrons that are close to the nucleus have _____ energy than electrons that are farther from the nucleus. Less
The atomic number is the number of ______ in the nucleus of an atom of an element. Protons
Isotopes have the same number of protons but different numbers of. Neutrons
An ion has a charge because it has gained or lost... Electrons
A ______ ion has more protons than electrons. Positive
Adding a(n) ________ to a neutral atom produces a new element. Proton.
Which particle in an atom has a positive charge? The proton
Which particle in an atom has no charge? The neutron
Which particle in an atom has a negative charge? The electron
Where is most of the mass of an atom found? In the nucleus
What is the difference between a heterogeneous mixture and a homogeneous mixture? A heterogeneous mixture is not evenly mixed while a homogeneous mixture is evenly mixed but not bonded together.
What is another word for a homogeneous mixture? Solution
Created by: phillmac2704
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