Atomic Structure
Which subatomic particle has a positive (+) charge?
What is a "proton"?
What is another name for a column on the periodic table?
Group or Family
Name the ionic compound NaCl
Sodium chloride
What type of reaction is:
CH₄ + O₂ → CO₂ + H₂O
Combustion
What is the solution to this problem:
(3 × 10⁸)/(3 × 10⁻⁷)?
1 × 10¹⁵
Which subatomic particle determines an element's identity?
How many valence electrons does chlorine (Cl) have?
7 electrons
Write the formula for calcium chloride
CaCl2
Is this equation a physical change or a chemical change?:
H₂O(l) → H₂O(s)
Physical change (phase change)
Convert 47 g to kilograms.
0.047 kg
An atom has 8 protons, 8 neutrons, and 10 electrons. What is its overall charge?
-2
How many total valence electrons are in CO2?
16
C = 4 ; O = 6 x 2 = 12
Name CCl4
Carbon tetrachloride
What reaction type occurs when H⁺ reacts with OH⁻ to form water?
Acid-base reaction
What SI unit measures temperature?
Kelvin (K)
Hydrogen-3 has 1 proton. How many neutrons does it contain?
2 neutrons
Which block contains the transition metals?
d-block
Which compound contains BOTH ionic and covalent bonds?
A. CO₂
B. NH₃
C. NH₄Cl
D. Al₂O₃
C. NH4Cl
Which reaction type involves a metal reacting with water and changing oxidation numbers?
Displacement (redox) reaction
Pressure and volume have what type of relationship according to PV = nRT?
Inverse relationship
Which statement is FALSE?
a. Electrons have very little mass
b. Neutrons determine isotopes
c. Protons determine the element
d. Electrons are located inside the nucleus
D. Electrons are located inside the nucleus
How many neutrons are in Carbon-12?
6 neutrons
Name the compound N₂O₅.
Dinitrogen pentoxide
2 nitrogen atoms --> di -
5 oxygen atoms --> penta- + oxide --> pentoxide
Balance the following equation:
__N2 + __H2 --> __NH3
N2 + 3H2 --> 2NH3
Estimate the molar mass of AuF₃ using rounded atomic masses.
~260 g/mol
(200 + 3 x 20)