Show:
Dimensional Analysis
Matter
Atomic Structure
Periodic Table
Chemical Bonding
100
repeated measurements agree closely but differ widely from the accepted value, these measurements are
What is precise, but not accurate?
100
burning, rusting, igniting, melting....the one that's not a chemical change.
What is melting?
100
the smallest unit of matter that maintains its chemical identity:
What is an atom?
100
aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is...
What is 27?
100
Name the compound Al2S3
What is aluminum sulfide?
200
measurement 0.000 065 cm written in scientific notation
What is 6.5 x 10–5 cm?
200
particles in a liquid compared to a gas are usually
What is closer together, lower in energy and/or less random?
200
According to the law of conservation of mass, the total mass of the reacting substances is
What is always equal to the total mass of the products?
200
This is the order that orbitals fill according to the Aufbau principle up to 5s
What is 1s 2s2p 3s3p 4s3d4p 5s
200
This is what VSEPR theory is a model for predicting
What is molecular shape?
300
The number of minutes in one week.
What is 10 080 minutes?
300
gas with an odor is released in a room, it can quickly be detected across the room because it
What is diffuses?
300
this contains a region of positive charge and a region of negative charge.
What is a polar molecule?
300
Elements in a group or column in the periodic table can be expected to have similar
What is properties?
300
extra electrons in the Lewis structure of the phosphate ion, PO4 -3
What is 3?
400
0.00930 m expressed in scientific notation
What is 9.30 x 10-3 m?
400
half-life of an isotope is the time required for half the nuclei in a sample to..
What is undergo radioactive decay?
400
formula for zinc fluoride
What is ZnF2
400
correct Lewis structure for hydrogen chloride, HCl
What is H -- Cl (with six additional dots around Cl)
400
formula for the compound formed by lead(II) ions and chromate ions
What is PbCrO4?
500
Which of these statements does not describe a measurement standard? a.Measurement standards avoid ambiguity. b.Measurement standards must be unchanging. c.A standard can be easily changed to suit the experiment. d.Confusion is eliminated when the correct measurement is applied.
What is C. A standard can be easily changed to suit the experiment.
500
Positrons, alpha particles, beta particles, gamma rays... the one with the greatest penetrating power:
What is gamma rays?
500
formula for aluminum sulfate
What is Al2(SO4)3
500
3d, 3f, 6d and 8s... the one that can never exist according to the quantum description of the atom:
What is 3f?
500
H2O, NH3, CH2Cl2 and CCl4... the one that has 3 covalent bonds:
What is NH3?