Chem 1103 Final Exam

As the temperature of a sample of H₂O_(l) deceases, the average kinetic energy of its molecules will

• a. decrease
• b. increase
• c. remain the same

What kelvin temperature is equivalent to -24 ⁰C?

• a. 226 K
• b. 249 K
• c. 273 K
• d. 297 K

The atomic mass of titanium is 47.88 atomic mass units. This atomic mass represents the 

• a. total mass of all of the protons and neutrons in the atom of Ti
• b. total mass of all the protons, neutrons, electrons in an atom of Ti
• c.  weighted average mass of the most abundant isotope of Ti
• d. weighted average mass of all the naturally occurring isotopes of Ti

More than two-thirds of the elements are classified as

• a. nonmetals
• b. metals
• c. metalloids
• d. noble gases

The arrangement of the elements in the present Periodic Table is based on atomic

• a. mass
• b. number
• c. radius
• d. density

Tags

NGSS.HS-PS1-1

Atoms of elements in a group on the Periodic Table have similar chemical properties.  This similarity is most closely related to the atoms'

• a. number of principal energy levels
• b. number of valence electrons
• c. atomic numbers
• d. atomic masses

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The elements in the modern Periodic Table are arranged according to their

• a. atomic number
• b. oxidation number
• c. atomic mass
• d. nuclear mass

Which list of elements contains two metalloids?

• a. Si, Ge, Po, Pb
• b. As, Bi, Br, Kr
• c. Si, P, S, Cl
• d. Po, Sb, I, Xe

Which element has chemical properties that are most similar to the chemical properties of sodium?

• a. Mg
• b. K
• c. Se
• d. Cl

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An element that is malleable and a good conductor of heat and electricity could have an atomic number of

• a. 16
• b. 18
• c. 29
• d. 35

Tags

NGSS.HS-PS1-1