Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Chapters 1-3

Chemistry

QuestionAnswer
Matter... Pure substance & Mixture
Mixture... Homogeneous & Heterogeneous. A blend of any two or more kinds of matter, as long as each maintain its own unique properties.
Homogeneous Mixture/ Solution... Particles distributed uniformly. Ex. sugar water, air, orange juice, chocolate bar.
Heterogeneous Mixture... Particles distributed non uniformly. Ex. sand & water, blood, salad, smog.
Pure substance (homo)... Compound & Element
Compound... Material composed of two or more components and can be chemically broken down into simpler substances. Ex Water(H2O), Salt (NaCl), Sugar( sucrose which is made of fructose & glucose).
Element... Pure substance that can't be further chemically divided. Ex. C (carbon), Si (silicon), N(nitrogen).
Khdbdcm... Kilo, hecto, deca, base units(grams/liters/meters), deci, centi, mili
Transition metals... The B's. Ex. 3B, 4B, Iron, Zinc.
A chemical property may be investigated by... Allowing silver to tarnish.
SI standard unit... Length - meter (m) Time - second (s) Amount of substance - mole (mole) Electric current - ampere (A) Temperature - kelvin (K) Luminous intensity - candela (cd) Mass - kilogram (kg)
Noble gases... Are colourless, odourless, tasteless, non-flammable gases, unreactive, and 8 valence electrons. Ex. helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn).
According to modern atomic theory... Atom of the same element may have different masses.
Because any element used in the cathode produced electrons, scientists concluded that... All atoms contained electrons.
Whose series of experiments identified the nucleus of the atom with the gold foil experiment?... Ernest Rutherford
Because most particles fired at metal foil passed straight through, Rutherford concluded that... Atoms were mostly empty space.
Because a few alpha particles bounced back from the foil, Rutherford concluded that they were... Repelled by densely packed regions of positive charge.
Rutherford's experiments led him to conclude that atoms contain massive central regions that have... A positive charge.
Most of the mass of an atom is occupied by the... Nucleus
Isotopes... Atoms with the same # of protons but different #'s of neutrons. They have different mass numbers.
Atoms... Smallest particle that represents an element.
Metals... Are malleable, ductile elements that have high electrical conductivity, on the left side of periodic table.
Atomic number... The number of protons in the nucleus of an element.
Metalloids... Elements on the dividing line between metal and nonmetals. Ex. Boron, germanium, silicon, antimony, arsenic, and tellurium.
Group... Vertical column of elements on the periodic table.
Nucleus... Central core of an atom, which contains most of the atom's mass.
Protons... Positively charged subatomic particles.
Mass number... The total number of protons and neutrons in an atom.
Atomic mass unit ( amu )... One-twelfth the mass of a carbon-12 atom.
Atomic mass... Average mass of all atoms (isotopes) of the same element.
Nonmetals... Brittle, non conducting elements found on the right side of periodic table. Ex. (F), (He), (Ne), (Ar), (Kr), (Xe), (Rn), (Cl), (Br), (I), (At), (C), (N), (O), (P), (S), (Se), (H).fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At),
Halogens... Group 7, are highly reactive and electronegative, readily combine with metals to form salts, 7 valence electrons. Ex. fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At).
Scientist who thought atoms were indivisible... John Dalton
Electrons can be found in... Energy levels. Outside nucleus.
Electron... Smallest subatomic particle, also has a negative charge.
Intensive physical property... They do not depend on the amount of matter that is present. Ex. Boiling Point, Density, State of Matter, Color, Melting Point, Odor, Temperature, Refractive Index, Luster, Hardness, Ductility, Malleability
Extensive Physical property... Extensive properties do depend on the amount of matter that is present. Ex. Volume, Mass, Size, Weight, Length
Scientist who discovered the neutron... James Chadwick
Scientist who worked with cathode rays, discovered electron... J.J. Thompson
Period... A horizontal row of elements.
As the mass number of an element's isotopes of an element increases, the number of protons... Remains the same.
As the atomic number increases, the number of electrons in a neutral atom... Increases.
The atomic mass unit (amu) is based on an isotope of... Carbon
The atomic mass of an element listed in the periodic table is the... Average atomic mass.
A physical change... A change from one state to another without a change in chemical composition which can be made by freezing, melting, or boiling a substance. Ex. Occurs when iron is melted in a furnace, when glucose is dissolved into water.
A chemical change... A change that occurs when one or more substances change into new substances with different properties. Ex. Occurs when sugars heated into caramel, glucose is made in photosynthesis, when glucose is converted into energy.
Burning of candle wax is classified as a chemical change because it... produces one or more new substances.
Chemistry... Study of the composition and structure of materials and the changes that materials undergo .
A physical change can be used to separate... mixtures
Physical property... Any characteristic of a material that can be observed or measured without changing the composition of the substances in the material. May be investigated by boiling a substance.
Molecules... Are two or more atoms chemically joined together.
Filtration... Pouring a mixture through a filter paper to separate the solid from the liquid.
Chemical property of hydrogen gas... It reacts explosively with oxygen.
Endothermic... Chemical reaction that takes in heat... feels cold.
Exothermic Chemical reaction that releases heat to the surrounding... feels hot.
Mass... Is determined by comparing the mass of an object with a set of standard masses that are part of a balance. It's a measure of quantity.
Substance... A type of matter that has a fixed composition of properties. Element or Compound.
Alkali metals... 1st group, reactive, solid at room temp., good conductors of heat & electricity, and shiny. Ex. Sodium (Na), Potassium (K), Rubidium (Rb), Caesium (Cs), Lithium (Li), Francium (Fr)
Alkaline earth metals... 2nd group, reactive, not found in nature, metallic.
Created by: mguzman564
Popular Chemistry sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards