Shared Flashcard Set

Details

Chemistry Test
Chemistry Test Study Guide Review
15
Chemistry
8th Grade
10/29/2009

Additional Chemistry Flashcards

 


 

Cards

Term
Explain what an atom is.
Definition
Atom- the smallest particle of an element
Term
Identify what particles atoms are composed of.
Definition
Atoms are composed of protons, electrons, and neutrons.
Term
Identify particle charge and location.
Definition
Protons- small, positively charged particle in the nucleus of an atom (+)
Electrons- tiny, negatively charged, high energy, particle outside the nucleus of an atom (-)
Neutrons- small uncharged particle in the nucleus of an atom
Term
Explain what the atomic number of an atom represents.
Definition
The atomic number of an atom represents the number of protons in the nucleus of an atom. (Could represent electrons)
Term
Explain what the atomic mass of an atom represents.
Definition
The atomic mass of an atom represents the average mass of one atom of an element.
Term
Be able to identify/solve for number of neutrons.
Definition
Atomic mass-atomic number (protons)= # of neutrons
Term
Correctly identify the atomic number, mass, symbol, and name of a given element.
Definition
Example:
Atomic #: 1
Element Symbol: H
Element name: Hydrogen
Atomic mass: 1.00794
Term
Describe what an electron shell is.
Definition
“Orbit” followed by electrons around an atom nucleus
Each shell can only contain a fixed amount
Each shell must be filled before e-3 can fill next shell
Term
Identify the maximum number of electrons found in each shell.
Definition
Follow formula of 2(n2)
Shell #1= 2 shells Shell #2= 8 shells
Shell #3= 18 shells Shell #4= 32 shells
Term
Use atomic number to complete electron shell diagrams.
Definition
Example: Lithium
Shell #1: 2 Shell #2: 1
Term
Distinguish between a group and period.
Definition
A group are the vertical columns on a periodic table (18 groups)
A period are the horizontal rows on a periodic table (7 periods)
Term
Correctly identify elements based upon group and period coordinates
Definition
(Ex. Group 2 Period 2 = Beryllium)
Term
Describe what valence electrons are.
Definition
Valence electrons are the electrons that are farthest away from the nucleus of an atom and involved in chemical reaction
# of valence electrons can range from 1 to 8
Term
Identify the number of valence electrons for an element.
Definition
The number of valence electrons for an element can be determined by the # of electrons on the outermost shell
The number of valence electrons for an element can also be determined by the group the element is in, and the last digit of groups determines valence electrons (Group 13 for Aluminum so there are 3 valence electrons)
Term
Create an electron dot diagram for an element.
Definition
Look for picture on google on electron dot diagram...
Supporting users have an ad free experience!