Physical Properties/change
Melting Point, boiling point, Color, texture, odor, volume, mass, etc.
What are some examples physical properties of matter?
Sodium gives one electron to chlorine to form sodium chlorine(table salt-NaCI)
What is an Ionic bond example?
Ability to form rust when exposed to oxygen
What is oxidation?
The change of state from a gas to a liquid.
What is condensation?
How many electrons are in the first shell?
2 electrons
They can be observed or measured without changing it to a different substance
Physical Properties
When pairs of valence electrons are shared between atoms.
What are covalent bonds?
The process by which one or more substances change to produce one or more different substances.
What is a chemical reaction?
The molecule must have enough thermal or kinetic energy to overcome forces in the liquid.
What does a liquid molecule need to escape into a gas state?
In a solution, the substance that is dissolved
A solid turning in a gas
Sublimation
Outermost electrons that react to form new compounds.
Valence Electrons
A change in matter that produces one or more new substances.
Chemical change
The conversion of a liquid to its vapor below the boiling temperature of the liquid.
What is evaporation?
A reaction that ABSORBS energy in the form of heat -temperature increases
Endothermic Reaction
A change in which the form or appearance of matter changes, but not is composition.
Physical Change
When valence electrons are transferred from one atom creating positive and negative ions.
What are Ionic Bonds?
How well or poorly a substance can burn or not burn in the presence of oxygen.
What is flammability?
The process in which a liquid is converted into a gas.
What is vaporization?
How many electrons are in the second shell?
8 electrons
Atoms that are tightly packed together.
What is a solid property of matter?
Hydrogen or water
What is an example of a Covalent bond? (This is a polar covalent bond)
Changes in color, formation of gas bubbles, changes in odor, etc
What are some signs of a chemical reaction?
The opposite of evaporation is ......
condensation
This reaction releases energy in the form of heat- temperatures decreases.
Exothermic Reaction