Vocab
What is the definition of a solid
A definite shape and a definite volume
What are the three main states of matter
Solid, Liquid Gas
What are valence electrons?
The electrons with the highest energy
What is the new substances from a chemical change?
Products
Is a proton negative?
no
What is the definition of fluid
A substance that flows
What is the opposite of fluidity
Viscosity
What is a chemical formula?
A group of symbols that shows the ratio of elements in a compound
what is the difference between Exothermic and Endothermic Reactions?
Exothermic Reactions release heat causing temperatures to rise While Endothermic reactions absorb heat making temperatures drop.
What is the atomic number of Helium?
2
What do subscripts do?
Subscripts tell the ratio of elements in a compound
what is an example(s)of sublimation?
dry ice, Snow, mothballs, Frozen foods
What is a chemical bond?
It's the force of attraction that holds atoms together as a result of the rearrangement of electrons between them
whats the difference between physical and chemical change?
Chemical changes produce one or more new substances and Physical changes the physical appearance but does not the substance in any way.
What does B stand for on the periodic table?
Boron
What is the definition of surface tension
An inward force or pull among the molecules in a liquid that brings the molecules on the surface closer together
What happens to gases when it is in a balloon and in hot and cold temperatures?
In hot temperatures the balloon expands while in cold temperatures the balloon shrinks.
What is the model of an atom?
A Carbon Atom has a nucleus made up of positively charged protons and neutral neutrons. The nucleus is surrounded by a cloud of negatively charged electrons.
It states that During a chemical reaction, matter is not created or destroyed
What is the 6th element on the periodic table?
what is an Inhibitor
A material used to decrease the rate of a chemical reaction
What is the difference between melting and melting point
Melting is the change of states from solid to liquid
The Melting point is when a solid becomes a liquid at a specific temperature
What is the difference between non-polar and polar bonds?
Non-polar bonds are covalent bonds where electrons are shared equally while a polar bond is a covalent bond where electrons are shared unequally.
What is Activation Energy?
The minimum amount for energy needed to start a chemical reaction
What is the atomic symbol for gold
Au