What has similar chemical properties of oxygen - ANS Sulfur
A piece of metal ore weighs 8.25 grams. When a student places it into a graduated cylinder
containing water, the liquid level rises from 21.25mL to 26.47mL. What is the density of the ore?
- ANS 1.58g/mL
How many protons (p) and neutrons (n) are in an atom of calcium-46? - ANS 26 p, 20 n
Which subatomic particle has the smallest mass? - ANS Protons
Which of the following volumes is equal to 10 mL - ANS 0.00010 mL
A student measured the diameter of a sphere and determined the average value. His
measurements are 5.17 cm, 5.16 cm, 5.16 cm, and 5.17 cm. If the true diameter is 6.18 cm. If
the true diameter is 6.18 cm what can be said about the students results? - ANS It is precise
but not accurate.
The observation that 15.0g of hydrogen reacts with 120.0g of oxygen to form 135.0g of water is
evidence for the law of - ANS Mass conservation
A sailor circumnavigated the earth and covered 4,264,000 meters. Express this number in
standard scientific notation. - ANS 4.264 x 10^6 m
How many significant figures are there in the answer to the following problem - ANS Four
What is not a Fundamental SI unit? - ANS gram
What are the possible values of l if n=5? - ANS 0, 1, 2, 3 and 4
What is the ground state electron configuration of tellurium - ANS [Kr]5s^24d^105p4
Which one of the following statements about temperature is false? - ANS The Celcius degree is
samller than the Fareinheight degree
The greater the energy of a photon, the... - ANS shorter the wavelength and the higher the
frequency
How many electrons can a sigle orbital hold - ANS 2
, Bromine belongs to the _____ group on the periodic table - ANS halogen
The horizantal rows of the periodic table are called? - ANS periods
The current model of the atom which is essentially all of the atoms mass is contained in a very
small nucleus, whereas most of an atoms volume is due to the space in which the atoms
electrons move was established by - ANS Rutherfords gold foil experiment
What is the identity of Q if the ion Q2+ contains ten electrons - ANS Mg
In which of the following sets do all species have the same number of protons? - ANS O, O2-,
O2+
How many electrons are in the ion, CO3^2- - ANS 32
The solid compound Na2CO3 contains - ANS Na+ ions and CO3^2- ions
Which of the following three sets consist of atoms or ions with the same electron configuration in
the ground state? - ANS (I) O2-, Ne, and Mg2+. (III) Hg, Tl+ and Pb2+
Which ion has the same electron configuration as Kr? - ANS All of the above, Rb+, Se2-, Br-
Which ion has the smallest atomic radius? - ANS Li+
Which ionization process requires the most energy? - ANS P3+(g)---->P4+(g)+e-
Which liberates the most energy? - ANS Cl(g)+e----->Cl-(g)
What is the trend in ionization energy and electron affinity values? - ANS Both increase as one
traverses a period from left to right and both decrease as one descends a group.
how many electrons does magnesium lose and nitrogen need to form Mg3N2? - ANS
magnesium loses two and nitrogen gains 3
the chemical formula for calcium nitride is? - ANS Ca3N2
At the equilibrium bond length - ANS The potential energy is a minimum
Which bond should have the highest bond dissociation energy - ANS N triple bond N
Element A has an elecrtonegativity of 0.8 and element B has an electronegativity of 3.0 which
statement best describes the bonding in A3B? - ANS The compound is largely ionic with A as
the cation
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