Phases of Matter
What are the three main phases of matter?
Solid, liquid, gas
What is the symbol for Gold?
Au
What are protons?
positively charged particles
What is a molecular element?
A substance formed when two or more of the same elements bond together
What is thermal energy?
The energy that comes from the temperature of matter.
What phase of matter has a definite shape and volume?
Solid
What does the atomic number represent?
Number of protons
What is the charge of an electron?
negative
Define a compound.
A substance formed when two or more elements chemically bond together.
How does thermal energy affect molecules?
It causes them to move faster as temperature increases.
What happens to molecules in a solid when heated?
Becomes a liquid
How many elements are in the periodic table?
118
What are neutrons?
neutral/ no charged particles
What is H2O an example of?
compound
Going to a solid to a liquid would require _________ thermal energy
Gaining thermal energy
Which phase of matter has no definite shape but a definite volume?
liquid
Which element has the atomic number 1?
Hydrogen
How do you calculate atomic mass?
protons + neutrons
Differentiate between a molecule and a molecular compound.
A molecule is two or more atoms bonded together; a compound is a type of molecule that contains different elements.
What happens to the temperature of a substance when it expels heat?
It decreases
What is the phase of matter at extremely high temperatures?
What is the chemical symbol, atomic number, and atomic mass for Calcium?
Ca, 20, 40
How many protons are in NaCl?
27
What is the chemical formula for carbon dioxide
CO2
A solid can turn into a gas if enough ___________ is added.
Thermal energy