Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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.
|