Biology Vocab Quiz

Compounds

Two or more atoms combined in a certain ratio

Electrons’ Use

used for building atoms and making compounds

Ions

Charged atoms (either positive or negative) that stay together because of opposite attraction

Ionic Bonds

Oppositely bonded ions by a share of electrons that are attracted to each other by electrostatic forces ( opposites attracted, likes repel)

Metal (but not exclusive to)

Lose electrons and become positive

Nonmetals

gain electrons and becomes positive

Chemical Bond

any attraction between two or more atoms (includes covalent bonds and ionic bonds)

Octet Rule

States that all atoms want 8 electrons in their outermost energy shell except hydrogen and Helium who want 2 electrons

Covalent Bond

Results when two or more atoms share electrons between them

Single Bond

Occurs when each atom donates 1 electron to the bond and is very flexible and can be easily broken by other atoms and reactions

Double Bond

Occurs when each atom donates 2 electrons to the bond and is not as flexible as single bond and is harder to break

Triple Bonds

occurs when each atom donates 3 electrons to a bond and is very strong and stable and is not easily broken apart by other atoms

Example for molecule

H2O

Example for Ions

salt (NaCl)

Examples for covalent Bond

Water (H20) +Glucose (sugar produced by animals) (C₆H₁₂O₆)

Examples of Single Bonds

Water molecules and hydrogen molecules (H₂)

Examples of double bonds

The oxegen molecule and carbon dioxide molecule

Tripple Bond examples

Nitrogen molecule that makes up 79% of our atmosphere

Example of Ionic Bonds and Ions

salt (NaCl)

All examples given

H₂O, Glucose (sugar produced by animals) (C₆H₁₂O₆), salt (NaCl), , carbon dioxide molecule, Nitrogen molecule, hydrogen molecule (H₂) and the oxegen molecule (O₂)