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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.
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

Midterm Study Guide

What is the density of a substance with a mass of 52 grams and a volume of 16 mL (density = mass/volume)? 3.25
The number of protons in the nucleus of an atom Atomic number
What are the parts of an atom? Nucleus-protons (positive) + neutrons (neutral) Electrons (negative) move around the nucleus
Be able to count the number of atoms of each element Ex: How many atoms of Magnesium are in the compound: MgBr2 There is 1 atom of Magnesium
An atom of the same element with the same number of protons but different number of neutrons isotope
What happens when atoms gain electrons? What happens when they lose them? Gain-become negative ions Lose-become positive ions
How are atoms arranged in solids, liquids, and gases? Solids-tightly packed Liquids-close together but able to move Gases-far apart
Process by which a gas turns into a liquid Condensation
Matter phase change from solid directly to gas Sublimation
Process by which matter changes from a liquid to a gas Evaporation
Temperature at which matter changes from a solid to a liquid Melting point
Temperature at which matter changes from a liquid to a solid Freezing point
Made up of one uniform component Homogeneous (coffee, tea, lemonade)
Made up of to or more distinct components Heterogeneous (Chex mix, pizza, sand/gravel)
What happens when a substance loses heat energy? What happens when a substance gains heat energy? Loses-temperature decreases Gains-temperature increases
What color does litmus paper turn with acids? What color does it turn with bases? Acids-red Bases-blue
A reaction that absorbs heat from the area Endothermic-feels cold
A chemical reaction that gives off heat energy Exothermic-feels hot
What are the signs of a chemical change? Formation of bubbles, light produced, color change, smell change, change in temperature
A change only in appearance of matter Physical change (ice melting, cutting paper)
A process that changes substances into new substances Chemical change (burning wood, digesting food, iron rusting)
What factors increase reaction rate? temperature, surface area, concentration
What is on the left side of a chemical equation? Reactants
What is on the right side of a chemical equation? Products
Created by: raymie.sonnier