Physical & Chemical Properties
This property is based on outside appearance
What is physical?
T/F: Atomic number is the number of electrons.
What is false?
The smallest unit of matter
What is an atom?
Anything that takes up space and has mass
What is matter?
Particles that have no definite shape
An example of a physical change
What is...
T/F: Atomic number increases from left to right on the periodic table
What is true?
How many elements are there?
What is 118?
T/F: As atoms vibrate faster, the space between them decreases.
What is false?
When particles slide past one another
What is a chemical reaction?
What is...?
Using the periodic table, find the element "Mercury". THEN WRITE: the element symbol, atomic number and number of electrons.
What is Hg, atomic number = 80, electrons = 80
What is a neutral atom?
When the number of protons and neutrons are equal.
T/F: The effects of adding heat are reversible
What is true?
What states of matter do freezing and melting have in common?
What are solids and liquids?
What are the three types of chemical reactions?
What is combustion, flammability and reactivity?
Explain the difference between atomic number and mass
Atomic number is the number of protons
What is the difference between an element and a compound?
An element is one pure substance; a molecule is made up of different elements
Movement of particles based on heat
What is kinetic energy?
What is sublimation?
Nickel has 28 protons, 31 neutrons and 28 electrons. What is its atomic mass?
What is 59?
Which element is larger in size, hydrogen or lead?
What is lead? (more protons in the nucleus)
Total energy based on temperature and number of particles
What is thermal energy?
How are liquids and gases alike?
What is "they both take the shape of their container"?