Introduction to Chemistry
The 5 areas of Chemistry are :
organic, inorganic, biochemistry, analytical, physical
Anything that occupies space and has mass
Matter
Who was the first person to use the term atom (atomos) when describing that matter can be divided into small pieces.
Democritus
True/False: Each electron has a fixed energy; these are energy levels.
True
Most elements are____________.
Metals
True/ false: If you think a piece of glassware looks cold, it is alright to grab it with your hands.
False
A basketball has more mass than a golf ball because
Which scientist was credited by discovering the electron from his research using a cathode ray tube?
J.J Thomson
What was a limitation of Rutherford's atomic model?
Didn’t explain the chemical properties of elements, such as characteristic colors of metals when heated in a flame
The energy required to remove an electron from an atom
Ionization energy
What axis would I put a dependent variable on?
Y-axis
Have a composition that is uniform throughout
homogeneous mixture
An element's _________ is the number of protons in the nucleus of an atom of the element.
Atomic Number
True/False: Energy levels greater than 1 have multiple orbitals with different shapes and at different energy levels or sublevels.
True
The ability of an atom of an element to attract electrons when the atom is in a compound.
electronegativity
When heating a substance in a test tube, the test tube should be pointed
Away from you and your partner
Define a compound
can be physically separated into its elements
Which type of mixture can be separated using distillation method?
homogenous mixture
What element group does not want any electrons? (Their outer orbital is full)
Noble gas
__________states that in forming compounds, atoms tend to achieve the electron configuration of a noble gas.
Octet Rule
Which area of study would you use to determine the components of an unknown liquid?
Analytical Chemistry
What is another name for a homogenous mixture
Solution
An atom contains 31 protons, 39 neutrons and 31 electrons. Identify the mass number of this atom.
Galium-70
A(n) ____________ of energy is the amount of energy required to move an electron from one energy level to another energy level.
quantum
the force of attraction that holds metals together; it consists of the attraction of free-floating valence electrons for positively charged metal ions
Metallic Bonds