Unit 1: Intro to Chemistry
Chemistry is the study of the composition
of and the changes that it undergoes.
Matter
What does the mass of an object measure?
amount of matter it contains
What are the characteristics of atoms according to Democritus are (3)
Unchangeable
Indestructible
Always existed
The element with 11 protons and 11 neutrons must be
sodium (Na)
Is lithium nitride a ionic or covalent compound?
Ionic compound
Who is credited with transforming chemistry from a science of observation to a science of measurement and is known as the “father of chemistry”?
Antoine Lavoisier
Can a pure substance be separated into components by physical methods.
No
All matter is made of?
Atoms
Isotopes of the same element differ in their
mass numbers
number of neutrons
The Stock System is primarily used when a compound contains
Transition metals
4. Who is generally credited with developing the process of using heat to prevent the growth of microorganisms and preserve milk?
Louis Pasteur
Liquids take the shape of their containers because the particles can do what?
can flow past each other
Who proposed the atomic theory in 1808?
Dalton
Identify the number of valence electrons for each of the following elements:
1, 6, 7
What is the name for the compound NaBr.
sodium monobromide
What are the freezing and boiling points of water on the Celsius temperature scale?
0 and 100
Would the length of a copper wire be a intensive or extensive property?
It is an example of an extensive physical property?
As an electron moves further away from the atom’s nucleus, its energy
Increases
Do The chemical and physical properties of an atom change when electrons are lost or gained?
Yes
what does the -ite and -ate suffix represent in a polyatomic ion?
That Oxygen is pesent in the formula
Calculate the density of a 7.00 mL oil sample that has a mass of 5.50 g.
0.786 g/mL
A mixture can be separated into its components by _______ means. And a pure
substance can be separated into components by _______ means.
physical, chemical
Who performed the gold foil experiment to identify the relative size of the nucleus?
Ernest Rutherford
What do the elements situated on the same period have in common?
The same number of electron shells
The correct name for the chemical formula Ag₂O is
Silver (1) Oxide