Unit 2
What is a substance made up of two or more elements chemically combined?
Compound
Like charges do what?
Repel
Which side of the periodic table are the non-metals located?
Right
A bond between a metal and a nonmetal is called?
Ionic bond
The molecules in liquids are much _____________ compared to gases.
Farther apart
Mixture
What is the term to describe the # of waves that pass through a single point in one second?
Frequency
What is the element w/ the highest ionization energy?
(He) Helium
Which noble gas is used in the noble gas configuration of Chlorine?
(Ne) Neon
Which intermolecular force has the strongest attraction force?
Hydrogen Bonding
A chemical change/reaction is..?
A change in which new molecules or substances are formed.
Which element is represented through this notation : [Ar] 4s2 3d10 4p2?
Germanium
What is the element w/ the highest atomic radius
(Fr) Francium
If the electronegativity between two elements is 0.2, what type of bond do they make?
Non-polar covalent bond
________ refers to a liquid’s resistance to flow.
Viscosity
What is an element?
A simple, pure substance that cannot be chemically broken down any further.
A certain scientist referred to “packets” of quanta as what? Name the scientist and the term he used.
Albert Einstein referred to packets of quanta as “photons”
What is the first ionization energy of an atom?
The energy required to remove the first outermost electron in an atom.
How many double bonds and lone pairs are there in ClO3- ?
One double bond and 8 lone pairs are in ClO3-
Is the London Dispersion Force between I2 or F2 stronger? Why?
I2 (explanation varies)
- because an I2 molecule is much bigger than an F2 molecule, meaning it has a greater force of attraction.
How is evaporation a method to separate mixtures?
It is a method to separate parts of a mixture that contain a dissolved solid in a liquid by removing the liquid and leaving behind only the solid.
How many filled 5d orbitals and unpaired electrons are there in a Platinum (Pt) atom in its ground state?
There are 4 filled 5d orbitals and 2 unpaired electrons
How does electrostatic attraction bond together two atoms?
Positive and negative charges on atoms attract each other, pulling them together. The force of attraction depends on the magnitude of the charge and the distance between the atoms.
Which has a larger atomic radius between Si - or Si 2+? Explain.
Si- is bigger because the atom gains an electron, meaning that it experiences greater electron-electron repulsion.
What are the three types of Intermolecular Forces, and when do they occur?
Dipole-dipole attraction occurs between polar molecules, Hydrogen bonding occurs when Hydrogen is bonded to a very electronegative atom, and London Dispersion Forces occurs between nonpolar molecules.