Download Chemistry CN Chemist: Date:______ Period:_____ Topic: Review

Chemistry CN
Chemist:_______________
Date:_____________
Period:_____
Topic:________________________________________________________________________
Review:
___________________
a pure substance made up of only ___________ type of atom.
___________________
smallest unit of an element that maintains the properties of that
element.
Types of Elements:
_________________- good _____________, lustrous, malleable,
ductile. Left of zigzag line.
_________________ - poor conductors, most are ________ at room
temperature. Right of zigzag line.
_________________ - characteristics of metals and nonmetals. On the
zigzag line.
Inside the Atom:
_____________
1) ________________________________________
2) define the element
3) equal to the _____________________
_____________
1) _______________charged particles
2) approximately the same size as protons (a bit more)
_____________
1) ________________________ charged particles
2) _________________ than the protons or neutrons
On the periodic Table you see:
Number

Atomic Symbol 
Avg. Atomic Mass 
_____________: the unique number of an element defined by the
number of ________________
- Equals the number of ______________
______________________: an abbreviation of an element
______________________: the average of mass numbers of the
_____________ of an element
Element 
________________________:
Mass Number:
-
atoms of the same element with different masses (mass
numbers
_____________ number of protons
_____________number of neutrons
-
mass of protons + mass of _____________
This number can vary between atoms of an element.
Chemistry CN
Chemist:_______________
Date:_____________
Period:_____
Topic:________________________________________________________________________
Two ways to represent Isotopes of an
atom:
1) Hyphen Notation:
- element name – mass #
Ex:
2) __________________:
- mass = upper left hand number
- # protons = lower left hand number
Ex:
_________________________(amu)
Summary: (3-4 GOOD sentences)
- 1 atom chosen arbitrarily for the standard
- _________________ has a mass of 12 amu
- _____________ = exactly 1/12 the mass of a carbon-12 atom
- The atomic mass of any ____________ is determined by
comparing it to carbon