Chapter 1
What is chemistry?
What is an intensive property?
A property that depends on the type of matter in a sample, not the amount of matter.
Is the 6.02 X 1023 the scientific notation of 602,000,000,000,000,000,000,000?
What is an atom?
Atoms are the smallest particles of an element that retains its identity in a chemical reaction.
What is a quantum of energy?
the amount of energy required to move an electron from one energy level to another
what are the steps in the scientific method?
What are the three states of matter?
Solid, liquid, gas
What is the difference between the experimental value and accepted value?
The error
What was Democritus’s Atomic Theory?
Atoms were indivisible and indestructible
What is the probability of finding an electron at various locations around the nucleus?
atomic orbital
What is the difference between independent and dependent variables?
Independent variables can be changed in an experiment and dependent variables are the responding variable.
True or False: The process that separates a solid from the liquid in a heterogeneous mixture is called Distillation.
False, its Filtration
What is the freezing point on the Celsius scale? What is it on the kelvin scale?
0 degrees Celsius and 273.15 kelvins
What is the nucleus?
The center of an atom
What is true according to the Aufbau principle?
Electrons occupy the orbitals of lowest energy first
True or False: Theories are the same as hypotheses.
False.
True or False: The first letter of a chemical symbol is always capitalized.
True!
What is the conversion factor?
A ratio of equivalent measurements
What are the three subatomic particles?
Electrons, protons, neutrons
What is amplitude of a wave?
The wave’s height from zero to the crest
What is bio Chemistry?
The study of processes that take place in living organisms.
How can you tell the difference between substances and materials?
If the composition of the material is fixed, it is a substance. If the composition of the material varies, it is a mixture
What is a dimensional analysis?
A way to analyze and solve problems by using units of the measurements
True or False: isotopes have the different number of neutrons and the same mass numbers.
False, they have different amounts of neutrons but DIFFERENT mass numbers
What is the ground state?
When the electron has its lowest possible energy