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20 Cards in this Set

  • Front
  • Back
What are protons?
-its charge
-where it is
-positivly charged
-bound w/ neutrons in nucleus
Neutrons
-its charge
-where it is
-neutral
-bound w/ protons in nucleus
electrons
-its charge
-where is it
-Negative
-space surrounding nucleus
what is a chemical element?
Pure substance that consists entirly of one type of atom
What are isotopes?
Atoms of the same element that differ in the number of neutrons they contain
What does an elements atomic number represent?
The number of protons in an atom
How are isotopes identified?
by their mass number
Why do all isotopes of an element have the same chemical properties?
They have the same number of electrons.
What is a chemical compound?
A substance formed by the chemical combonation of two or more elements in the definite proportions.
What holds atoms in compounds together?
chemical bonds
How is a covalent bond formed?
When electrons are shared between atoms.
How is an ionic bond formed?
When one or more electrons are transfered from one atom to another.
What is an ion?
positivly and negativly charged atoms.
What is a water molecule's charge?
Neutral
What is cohesion?
Attraction between molecules of the same substance.
What is adhesion?
Attraction between molecules of different substances.
Why is water extremely cohesive?
because of hydrogen bonding
The rise of water in a narrow tube against the force of gravity is called?
Capillary action
What is a mixture?
Composed of 2 or more elements or compounds that are physically mixed together but not chemically combined.
What is a solution?
A mix of 2 or more substances-molecules are evenly mixed.