Chemistry Chapter 2 Flashcards
Covalent bond
a bond between two or more nonmetals that share electrons
Ionic bond
the attraction between two oppositely charged ions. A bind between a metal and a non metal.
Chemical formula
a combination of symbols and numbers that give the ration of atoms and elements in a compound
Ion
a atom that has gained a charge by either losing or gainin electrons
Polyatomic ion
an ion that is made from multiple non metal atoms
Diatomic molecule
atoms of the same nonmetal covalently bonded together
Structural formula
a visual representation that shows how the atoms are bonded together
Compound
a combination of two or more atoms bonded together.
Mole
a unit of measurement that allows us to think about an elements mass in terms of grams
Ionic bond properties
- bond between a metal and a non metal
- the metal always looses the electrons and becomes positively charged
- nonmetals always gain the electron and become negatively charged
What is happening with the electrons in an ionic bond
The electrons go to the non metal
How to name an ionic compound
- write the name of the metal
- write the name of the metal with the ending changed to ide
Properties of ionic compounds
- hard brittle crystals
- conduct electricity when dissolved in water-because the compound breaks into individual ions so current can pass through the water
- high melting point
Why ionic compounds conduct electricity when dissolved
They can only conduct when the practicals are moving around
Elements involved in a covalent bond
Only non metals
