Sig Figs
Definitions
Compounds
Atoms
Random
100
0.00340
What is 3
100
The difference between accuracy and precision.
Accuracy: how close you are to the accepted value; Precision: how close your results are to each other.
100
The formula for phosphorus pentachloride.
What is PCl5
100
Three types of subatomic particles and their charges.
What is electron (negative), proton (positive), neutron (neutral)
100
The difference between a chemical and physical property.
What is physical property can be observed without changing the substance. Chemical property is ability to undergo chemical change (rot, rust, burn)
200
.00033
What is 2?
200
The attraction of free-floating valence electrons for positively charged metal ions.
What is metallic bonding?
200
The formula for acetic acid.
What is HC2H3O2
200
How you determine the number of protons & neutrons in an atom.
What is atomic number = protons, atomic mass - atomic number = neutrons.
200
The difference between a mixture and a compound.
What is mixtures can be separated physically, but compounds cannot.
300
4,080,000,000
What is 3?
300
Mixture composed of 2 or more elements - at least one of which is a metal.
What is an alloy?
300
The name of: Fe(C2H3O2)3
What is iron acetate?
300
Definition of an isotope.
What is an element with a different atomic mass due to a different number of neutrons in the nucleus.
300
The difference between a period and group on the periodic table.
What is group is vertical columns (ex. families), period is the horizontal rows (ex. energy levels)
400
How do you round when multiplying/dividing?
What is least number of sig figs?
400
When an element has a higher electronegativity and pulls electrons closer to itself, the bond is said to be:
What is polar?
400
Formula for cobalt (II) hydroxide
What is Co(OH)2?
400
In Bohr's atomic model, the protons, neutrons, and electrons were placed where?
What is protons + neutrons in the center (nucleus) and the electrons orbiting outside the nucleus in fixed orbits.
400
When you go across the periodic table (L-R), atomic radius does this.
What is decreases.
500
How do you round when adding/subtracting?
What is least number of decimal places?
500
These are the 2 different types of mixtures.
What is homogeneous and heterogeneous?
500
The name of B2F6
What is diboron hexafluoride?
500
State the Heisenberg Uncertainty Principle.
What is you cannot precicely know BOTH the position and velocity of a moving particle in an atom.
500
When you go top to bottom on the periodic table, atomic radius...
What is increases.
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