Chemistry Exam Review

What is the volume in this buret?

• 24.1mL
• 24.3mL
• 24.2L
• 24.2mL

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

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

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NGSS.HS-PS1-1

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

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

In the ground state, atoms of the elements in Group 15 of the Periodic Table all have the same number of

• a. filled principal energy levels
• b. occupied principal energy levels
• c. neutrons in the nucleus
• d. electrons in the valence shell

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NGSS.HS-PS1-1

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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

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NGSS.HS-PS1-1

According to the Periodic Table, which element has more than one positive oxidation state (number)?

• a. cadmium
• b. iron
• c. silver
• d. zinc

As the elements in Period 3 are considered from left to right, they tend to

• a. lose electrons more readily and increase in metallic character
• b. lose electrons more readily and increase in nonmetallic character
• c. gain electrons more readily and increase in metallic character
• gain electrons more readily and increase in nonmetallic character

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2