Chemistry Midterm Review

If two oxygen atoms combine to make a molecule (O₂), what type of bond will they form?

• an ionic bond
• a hydrogen bond
• a metallic bond
• a covalent bond

How does an S^-2 ion differ from an electrically neutral sulfur atom?

• mass number
• atomic number
• nuclear charge
• number of electrons

Which of these elements has the smallest atomic radius?

• Beryllium
• oxygen
• sodium
• sulfur

An atom contains 70 protons, 70 electrons, and 99 neutrons. What is the mass number?

• 239
• 169
• 140
• 70

Which of these compounds is most likely to contain an ionic bond?

• H₂
• CO₂
• PCl₅
• CaO

Tags

NGSS.HS-PS1-3

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

Tags

NGSS.HS-PS1-1

What is the noble gas configuration for Sulfur?

• [Ar] 3p⁴
• [He] 3s² 3p⁴
• [Ne] 3s² 3p⁴
• [Na] 3s² 3p⁴
  

Tags

NGSS.HS-PS1-1

Which of these elements is the most electronegative?

• oxygen O
• tellurium Te
• Ne neon
• strontium Sr

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these elements has the SMALLEST atomic radius?

• H hydrogen
• Rb rubidium
• Li lithium
• Fr francium

Which of the following will have a lower ionization energy than Scandium (Sc)?

• Helium (He)
• Titanium (Ti)
• Calcium (Ca)
• Magnesium (Mg)

Tags

NGSS.HS-PS1-1