BIOS 251 Week 2 Chemistry

Electrolytes

Any substance that gives off or forms ions when dissolved in water

Protons

+1 charge

three types of chemical bonding

- ionic bonding - covalent bonding - metallic bonding

Ionic Bonding

- typically between metals and nonmetals - form between cations (positive charge) and anions (negative charge) - forms by the transfer of electrons

Covalent Bonding

- typically between nonmetals - nonmetals form covalent bonds by sharing electrons between them

Neutron

0 charge

Element

a form of matter that cannot be broken down any further by chemical reactions

molecules

atoms can react with either atoms of the same element or atoms of different elements to create molecules.

Ions

atoms or molecules with an electrical charge which arises from an imbalance of protons and electrons

Electrons

much smaller mass than protons or neutrons, -1 charge

atomic number

number o protons in an atom

atomic weight

the average mass of an atom of that elect

Atom

the smallest particle an element that still has the properties of that element

mass number

the total number of protons + neutrons in an atom