Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Normal Size Small Size show me how
Unit 1 ch 2
| Question | Answer |
|---|---|
| Matter | occupies space and possesses rest mass, especially as distinct from energy. |
| Element | A substance that cannot be decomposed into simpler substances |
| Compound | A substance consisting of atoms or ions of two or more elements that are chemically bonded together, |
| Atomic nucleus | is the small, dense region consisting of protons and neutrons at the center of an atom |
| Atomic number | the number of protons in the nucleus of an atom |
| Mass number | the total number of protons and neutrons in a nucleus. |
| Atomic mass | the mass of an atom of a chemical element expressed in atomic mass units. |
| Isotopes | Different forms of the same element with the same number of protons but different number of neutrons |
| Radioactive isotope | An isotope having an unstable nucleus that decomposes spontaneously |
| Energy | Capacity to cause change |
| Potential energy | Energy that matter possesses Bc of its location or structure |
| Electron shells | A characteristic average distance and energy level |
| Valence electrons | Outer electrons |
| Valence shell | Outermost electron shell |
| Chemical bond | Attractions |
| Covalent bond | Sharing of a pair of valence electrons by two atoms |
| Molecule | Two or more atoms held together by covalent bonds |
| Single bond | A pair of shared electrons |
| Double bonds | O = O |
| Valence | the combining power of an element |
| Electronegativity | The attraction of a particular atom for the electrons of a covalent bond |
| Nonpolar covalent bond | Electrons are shared equally |
| Polar covalent bond | Electrons are not shared equally |
| Ion | A charged atom |
| Cation | Positive charged atom |
| Anion | Negatively charged atom |
| Ionic bond | Oppositely charged bonds |
| Ionic compound | Compounds formed by ionic bonds |
| Hydrogen bond | Noncovalent attraction between a hydrogen and an electronegative atom |
| Chemical reactions | Making and breaking of chemical bonds, leading to changes in the composition of matter |
| Polar molecule | Charge is unevenly distributed (uneven electron charge) |
| Cohesion | Hydrogen bonds hold the substance together |
| Adhesion | Sticking of one substance to another |
| Surface tension | How hard it is to break the surface area |
| Kinetic energy | Anything that moves, energy of motion |
| Hydration shell | Sphere of water molecules around each dissolved ion |
| Hydrophilic | Likes water |
| Hydrophobic | To repel water |
Created by:
Lohi
Popular Biology sets