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Chapter 1 reveiw
has to do with atoms and matter
Question | Answer |
---|---|
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 |