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If a set of measurements is close together but far from the actual value the are ___.
precise but not accurate
accurate and precise
not accurate or precise
accurate but not precise
What is the largest unit of mass? gram, mg, cg, kg
kg
What is the density of water?
1 g/cm^3 (1 g/mL)
T/F: Density is dependent on the amount of the substance that you have.
False
What is 3.12 x 10^-3 in standard form?
0.00312
What is 451,000 in scientific notation?
4.51 x 10^5
What is the correct formula for the ionic compound containing: Potassium (K) and Oxygen (O)
K+1 and O-2 --> K2O
What is the correct formula for the ionic compound containing: Calcium (Ca) and Sulfur (S)
Ca+2 & S-2 --> Ca2S2 --> CaS
Which has the largest atomic radius Magnesium (Mg) or Potassium (K)?
Potassium (K)
Which is the most electronegative calcium (Ca) or beryllium (Be)?
Be
What is an anion? describe how it is formed
negative ion; gain of electrons
What is a cation? describe how it is formed
positive ion; loss of electrons
What are columns of the periodic table called?
group/family
What does the group/family tell you about the structure of the atom?
number of valence electrons
What does the period tell you about the structure of the atom?
number of energy levels
Why do atoms in the same family have similar chemical properties?
same number of valence electrons
