OnRamps Chemistry 301 Unit 0 Part 1 - Exam 1

Which of the following statements is true about the structure of the

atom?

• neutrons and protons have approximately the same mass

• neutrons and electrons have approximately the same mass

• protons and electrons have the same charge

• protons and neutrons have the same charge

Which of the following statements is NOT true?

• Protons are found in a dense core in the center of the atom

• Neutrons are found in a dense core in the center of the atom

• Electrons are the smallest fundamental particle but take up the most

  volume of the atom

• Electrons are found in a dense core in the center on the atom

Which of the following statements is NOT true about an element’s atomic

composition?

• The number of electrons associated with an element can vary

• The number of protons associated with an element can vary

• The number of neutrons associated with an element can vary

• Electrons do not contribute significantly to the mass of an atom

Which of the following statements is true about group names in the periodic table?

• Group I is the alkaline earth metals

• Group III is the halogens

• Group VII is the alkali metals

• Group VIII is the noble gases

Which of the following is associated with the number of valence electrons for a main group elements?

• The group number

• The atomic number

• The periodic table

• The atomic mass

Which of the following statements is false about the periodic table?

• The second shell is made up of 18 elements

• The main group of elements are found in the s and p subshells

• The number of valence electrons for an atom can be readily determined from

  information in the periodic table

• The molar mass of a compound can be readily determined from information in

  the periodic table

How many lithium atoms are needed to correctly balance sulfur to form a neutral salt?

• 1

• 2

• 3

• 4

Which of the following is the correct formula unit for aluminum oxide?

• AlO

• Al₃O₂

• Al₂O₃

• Al₂O₂

Which of the following is the correct name for CCl4?

• Carbon Tetrachloride

• Carbon Chloride

• Monocarbon Tatrachloride

• Chloroform

Which of the following has both ionic and covalent bonds?

• NH₄Cl

• Al₂O₃

• NH₃

• CO₃²⁻