What is the particular significance of valence electrons?
a) The number of valence electrons is the atomic number for that element
b) Unlike electrons in other shells, valence electrons have no charge
c) The number of valence electrons defines the type of element
d) Valence electrons always balance the charge produced within the nucleus
e) Valence electrons form chemical bonds between atoms by being transferred or shared
e) Valence electrons form chemical bonds between atoms by being transferred or shared
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What are some of the questions focused by geologists?
a. The formation and composition of our planet b. The causes of earthquakes and ice ages c. The evolution of life d. Protection of water resources e. Exploration of oil and ores d. Environmental remediation f. All of the above
Which of the following was common to the eruptions of Vesuvius and Mount St. Helens?
A) Both are composite volcanoes B) Earthquakes before the eruption C) Small eruptions of tephra D) Pyroclastic flows E) All of these are correct.
Describe three ways in which business and industry help to conserve
freshwater. What will be an ideal response?
Which of the following is true of the axial positions in cyclohexane?
A) Each carbon atom of the ring has two groups bonded to it in axial positions. B) Each carbon atom of the ring has one group bonded to it in an axial position. C) The axial positions are all on the same side of the ring. D) The axial and equatorial positions on each carbon atom are on the same side of the ring.