Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

ch11 jamal1


Ch. 11 & 12 STUDY NOTES
Atoms= make up everything
Parts of an atom= nucleus (protons & neutrons)
Protons= (+) charge (positive charge)
Neutron= have no charge
Opposites attract= + attracts – vice versa
Electrons= (-) charge (negative charge)
Mass of electron= is smaller than the mass of protons or neutrons
Electron cloud= makes up most of the volume of an atom
Electrons, protons, and neutrons= make up the atom (subatomic particles)
Element= is a substance that cannot be broken down into a simpler substance by ordinary chemical means
Pure substance= matter that has the same composition throughout and cannot be separated into its parts by physical means
There are more than 100 different kinds of atoms= (about 90 of the elements are found in nature)
Examples or a natural elements= carbon, oxygen, gold, silver, and iron
Atom= is the smallest unit of an element that has the properties, or characteristics, of that element
Molecule= is a group of two or more atoms held together by very strong chemical bonds
A molecule= can be made up of more than one atom of the same element
Example= molecule in oxygen gas contains two atoms of oxygen
Compound= pure substances made up of two or more different elements that are chemically joined
Elements= are always found in the same portion
Example= table salt has the chemical formula NaCl
This compound= always has exactly one atom of sodium (Na) and one atom of chlorine (Cl)
Elements, compounds, and mixtures= are identified and represented by chemical formulas
Periodic table of elements= presents and organs information about all the elements
Each element= has a box in the periodic table that contains information specific to that element
First letter= always capital in box of elements
Atomic number= identifies the number of protons in the nucleus of one atom of an element
Atomic mass= the weighted average of the masses of all the naturally occurring isotopes of an element
The periodic table= is a useful model that can help you understand the properties of elements
Horizontal row= in the table is called a period
Periods are numbered 1-7
Vertical row= in the table is called a group
Groups are numbered 1-18
Periods are numbered 1-7
Metals= more than 75% of the elements in the periodic table are metals
Metal properties= metals are usually shiny, malleable, ductile, and are usually slid at room temperature and good conductors of heat and electricity
Nonmetals= are elements that are not metals
Nonmetal properties= some are gases but the solid ones have these properties, usually dull in appearance, brittle, and poor conductors of heat and electricity
Metalloids= substances that have some characteristics of both metals and nonmetals
Metalloid properties= semi-conductors
Chemical property= characteristic that determines how a substance will interact with other substances during a chemical reaction
Observing chemicals= you cannot observe a chemical property of a substance without changing the substance
Reactivity= describes how likely an element is to react and form bonds with other elements
Ion= is an atom that has a positive or negative charge
Ions form= when atoms gain or lose electrons
Inert=unable to react chemically
Halogens=the most reactive nonmetals
Alkali Metals= the elements in group 1 of the periodic table, they are the most reactive metals
Alkaline-earth metals= the elements in group 2 of the periodic table, they are reactive but are less reactive than alkaline metals
Transition Metals= do not give away electrons as easily as atoms of the groups 1 and 2 metals do, making them less reactive then alkali and alkaline-earth metals
Boron Group= one metalloid and four metals, somewhat reactive
Carbon Group= one nonmetal, two metalloids and two metals reactivity varies amongst the elements
Nitrogen Group= two nonmetals, two metalloids and one metal varies among the elements
Oxygen Group= three nonmetals, one metalloid, and one metal reactive
Halogens= are very reactive nonmetals because of their atoms need to gain only one electron to have a complete outer level
Noble Gases= are unreactive nonmetals
Hydrogen= nonmetal that is reactive
Created by: PhySciLewis1