Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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

Biology Chapter 2.1

Biology Chapter 2

TermDefinition
Matter Anything that has mass and takes up space.
Mass A measure of the amount of matter in an object; a fundamental property of an object that is not affected by the forces that act on the object, such as the gravitational force.
Element A substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number.
Atom The smallest unit of an element that maintains the chemical properties of that element.
Nucleus In physical science, an atoms central region, which is made up of protons and neutrons.
Proton A subatomic particle that has a positive charge and that is located in the nucleus of an atom; the number of protons of the nucleus is the atomic number, which determines the identity of an element.
Neutron A subatomic particle that contains a lobed nucleus and many cytoplasmic granules.
Atomic Number The number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element.
Mass Number The sum of the numbers of protons and neutrons in the nucleus of an atom.
Electron A subatomic particle that has a negative charge.
Orbital A region in an atom where there is a high probability of finding electrons.
Isotope An atom that has the same number of protons (or the same atomic number) as other atoms of the same element do but that has a different number of neutrons (and thus a different atomic mass).
Compound A substance made up of atoms of two or more different elements joined by chemical bonds.
Chemical Bond The attractive force that holds atoms or ions together.
Covalent Bond A bond formed when atoms share one or more pairs of electrons.
Molecule A group of atoms that are held together by chemical forces; a molecule is the smallest unit of matter that can exist by itself and retain all of a substances chemical properties.
Ion An atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge.
Ionic Bond The attractive force between opposite charged ions, which form when electrons are transferred from one atom to another.
Created by: DragonT20
 

 



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