If there are the same number of argon atoms in one sample and the same number of carbon atoms in another, then the value of the ratio, mass of the carbon sample/the mass of argon sample would be? a. 1.0 b. 3.3 c. 0.30 d. 12 e. 40

c. 0.30

Explanation:

One C atom has a mass of 12.0 u and one Ar atom has a mass of 40.0 u.

Let’s assume that there are n atoms of C and n atoms of Ar. Then

Mass of n C atoms = n × 12.0

Mass of n C atoms = 12.0n u

Mass of n Ar atoms = n × 40.0

Mass of n Ar atoms = 40.0n u

ratio = mass of C/mass of Ar

ratio = 12.0n/40.0n

ratio = 0.300

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

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