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Q2 Exam
Isotopes, 1/2 life, & Chemical bonds
16
Science
8th Grade
01/10/2008

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Cards

Term
Atoms of the same element that have different numbers of neutrons
Definition
What is an isotope?
Term
carbon 12 and carbon 14
Definition
What are the isotopes of carbon?
Term
subtract the atomic # from the atomic mass
Definition
How can you find out the number of neutrons in an atom?
Term
Space in which electrons are likely to be find
Definition
What is an electron cloud?
Term
Ionic Bonds
Definition
What bond involves a transfer of electrons?
Term
One atom gives up an electron and the other gains an electron
Definition
What happens in an ionic bond?
Term
An atom that gains electrons
Definition
What is a negative ion?
Term
An atom that loses electrons
Definition
What is a positive ion?
Term
covalent bonds
Definition
What is the strongest bond?
Term
Atoms with high ionization energy combine
Definition
What is a covalent bond?
Term
Atoms share electrons rather transfer
Definition
What happens in a covalent bond?
Term
the outermost shell
Definition
In a covalent bond, electrons are only shared if they are in what level?
Term
metals
Definition
What type of elements give up electrons easily?
Term
the atoms of metals
Definition
What forms metallic bonds?
Term
when a collection of electrons from atoms bond together
Definition
What occurs during metallic bonds?
Term
The time it takes for half of the nuclei of a radioactive substance to decay
Definition
What is a half life?
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