Hodgepodge
4 properties of metals
Sea of electrons; malleable; ductile, conduct heat and electricity, form cations, ...
Melting is this type of change
What is a Physical Change?
The principle that states that electrons occupy the lowest possible energy level
What is Aufbau principle?
The two elements most similar in properties: Na, K, Ca, Cl - and why
K and Na - same number of valence electrons (same group)
A series of measurements that are all very close to each other (i.e. are reproducible) are
What ia precise.
A change that produces a new substance.
What is a Chemical Change?
What is the type of reaction below? Will it happen (justify): 2Na + MnCl2 --> 2NaCl + Mn
SIngle Replacement - YES - Na is above Mn in the activity series
The names, charges and number of valence electrons of Groups 1, 2, 7, 8
Group 1: Alkali metals (1 ve; +1)
GROUP 2: Alkaline earth metsla (2 ve; -2)
GROUP 17: Halogens (7 ve; -1)
GROUP 18: Noble gases (8 ve; 0)
The type of bond in PCl3 if the electronegativity of P and Cl are 2.1 and 3.0, respectively
What is polar covalent.
A formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.
What is Empirical Formula?
Matter is neither destroyed nor created
What is the Law of Conservation of Matter?
Can you name the other 2 key laws?
the energy needed to remove an electron from an atom
The symbol and name for an isotope with 14 protons and 16 neutrons
30Si and silicon-30
The weakest IMF
What are LDFs (London dispersion forces).
5 parts of Dalton's atomic theory- which have changed?
1)All elements are composed of small particles [atoms]
2)All atoms of the same element have the same mass; atoms of different elements have different masses
3)Atoms only combine in small, whole number ratios
4)In chemical reactions, atoms are combined, separated or rearranged.
5)(implied) Atoms cannot be subdivided, created or destroyed.
Another name for a solution.
What is a Homogeneous Mixture?
Columns and rows in the periodic table (2 answers).
Group and Period (resp.)
If you change the number of neutrons, you change the
isotope (mass)
Example of an element that can violate the octet rule by having A) less than 8 and B) more than 8 electrons around the central atom
A) B, Be, Li, H
B) S, P, Cl, I, ... (rows 3 and lower)
The scientists who discovered the A) electron and B) nucleus. BONUS: Name the experiment.
A) JJ Thomson
B) Rutherford
Block, period, group and identity of the element with the abbreviated electron configuration: [Xe] 6s24f145d106p4
Po: Block = p, Period = 6, Group = 16
Rank these elements from lowest to highest first ionization energy and smallest to largest atomic radii:Francium; Silver; Oxygen Gold
IE: Fr<Au<Ag<O
AR: O<Ag<Au<Fr?
BONUS: Explain in terms of shielding and nuclear charge
An orbital
Region around the nucleus where an electron is likely to be found
hydrogen bonds may form when
there is a H atom bonded to NOF.