Scientific Skills
Nature of Matter
Atomic Theory
Electrons in Atoms
Bonding
100
What is the first step in the scientific method?
Observation
100
What are the three phases of matter
solid, liquid, gas
100
What subatomic particle is not found in the nucleus?
Electron
100
When an atom gains an electron the charge of the atom goes from...
neutral to negative
100
Ionics compounds tend to have ___ melting points
High
200
Convert 200.50 x 103 into scientific notation
2.0050 x105
200
Convert 127 Celsius to Kelvin
400 K
200
Why were alpha particles deflected during the Rutherford gold foil experiment?
Alpha particles are repelled by positive nucelus.
200
What is the element that has an excited electron configuration of 2-8-1-1
Mg
200
What type of bonding occurs between the atoms of NH4NO3
Covalent and Ionic
300
Convert 1354km to cm
1.354 x 108 cm
300
Two substances are mixed together in a beaker, the beaker's temperature begins to increase. This means that that process is
Exothermic
300
What is the atomic mass of element X that has two isotopes, X-150 with 30% abundance, and X-153 with 70% abundance
152.1 amu
300
Calculate the formula mass for Al2(SO4)3
342.15g
300
Name the compound CCl4
Carbon Tetrachloride
400
Target D displays what
High accuracy and High precision
400
What separation technique is used to separate by molecule mobility?
Chromatography
400
Describe the location of the electron in the quantum mechanical model.
Electron cloud, orbital, waves
400
What percentage of O in the compound
Aluminum hydroxide
61.5%
400
Describe all intermolecular forces present in the compound CH3Cl
London Dispersion Force, Dipole- Dipole
500
How many significant figures are in the number
25004000000
4
500
How many joules are needed to boil 100g of ice from 0 celsius?
301 kJ
500
When an excited state electron relaxes...
Moves to a lower energy state and releases energy
500
Write the formula for Titanium (III) Phosphate
TiPO4
500
Determine the polarity of CF4
Non-polar Covalent