What is the type of bonding in covalent / molecular compounds?

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Identify if the following half-reaction is an oxidation or a reduction reaction.   Fe3+  + 3 e-  –>  Fe 

Which of the following statements about how and why neutral atoms form ions is FALSE?

What type of chemical reaction does the following unbalanced chemical equation represent? LiClO3 —-> LiCl + O2

An unknown element, X, occurs naturally as three isotopes.  In a sample of this element, 28X has a mass of 27.977 amu and is 92.21% abundant in the sample, 29X  has a mass of 28.976 amu  and is 4.70% abundant in the sample and 30X has a mass of 29.974 amu  and is 3.09% abundant in the sample (1) Calculate the Average Atomic Mass (weighted average) of this element.  Report to proper number of significant figures and units.   SHOW WORK FOR IN ORDER TO EARN FULL CREDIT. HINT:  Set up a table like shown in the notes. (2)  What is the identity of this element?  HINT:  Use the average atomic mass and reference the Periodic Table.

Which of the following is NOT identified correctly?

How many ‘p’ ELECTRONS are possible in a ‘p’ sublevel?  First: think about how many ‘p’ orbitals are in a ‘p’ sublevel.

EXTRA CREDIT FROM–Focus on Health & Medicine Sections :  Each question can be answered separately to earn points. (1) What disease can be identified by giving a patient sodium iodide (NaI) that contains the radioactive isotope iodine-131? (2) What is the shape that is see when a patient is given sodium iodide (NaI) that contains the radioactive isotope iodine-131 when a healthy gland is present? (3)  What is the major cation present in blood and extra cellular bodily fluids which is carefully regulated through a number of mechanisms to maintain blood volume and blood pressure within acceptable ranges that permit organ function? (4)  What is the cation found in hemoglobin that is essential for oxygen transport by red blood cells? (5) What is the cation that is needed for nerve transmission and muscle control? (6)  Hydrogen peroxide, H2O2, is used to disinfect wounds.  The structural formula is H-O-O-H.  What is the geometry around the first oxygen in hydrogen peroxide? (7)  Acetaminophen is a pain reliever.  Within the structure, there is a carbon with bonds to four other atoms.  What is the geometry around this carbon? (8)  What is the function of a pacemaker? (9)  A pacemaker contains a lithium-iodine battery.  The 2 half-reactions that occur in the Redox-Reaction  2 Li  +  I2  –>   2 Li  are: 2 Li  –>   2 Li1+  + 2e- I2  +  2 e-  –>  2 I1- Which of the above reactions represents the oxidation reaction?  Explain why.

What would the relative size of the electron cloud be, if the nucleus were the size of a softball?