Weegy: The atomic number of oxygen is 8, because oxygen has
eight protons in the nucleus.
User: The purpose of an indicator is to
A. help acids and bases dissociate when placed in water.
B. test and determine the pH values of unknown solutions.
C. conduct electricity.
D. make a solution more neutral.
Weegy: The purpose of an indicator is to test and determine the pH values of unknown solutions.
User: The rare earth elements include
A. the lanthanide series and the alkali metals.
B. the alkali metals and the transition metals.
C. the actinide series and the alkaline earth metals.
D. the lanthanide series and the actinide series.
Weegy: The rare earth elements include the lanthanide series and the actinide series.
User: Which of the following is represented in the highest percentage by volume in dry air?
A. Oxygen
B. Hydrogen
C. Carbon dioxide
D. Nitrogen
Weegy: Nitrogen is represented in the highest percentage by volume in dry air.
User: Which of the following is represented in the highest percentage by volume in dry air?
A. Oxygen
B. Hydrogen
C. Carbon dioxide
D. Nitrogen
Weegy: Nitrogen is represented in the highest percentage by volume in dry air.
User: Which non-metal makes up diamond, graphite, and the majority of coal?
A. Oxygen
B. Magnesium
C. Sodium
D. Carbon
Weegy: Carbon makes up diamond, graphite, and the majority of coal.
User: Which of the following elements is stable?
A. Boron, atomic number 5
B. Neon, atomic number 10
C. Carbon, atomic number 6
D. Fluorine, atomic number 9
Weegy: Neon, atomic number 10, is a stable element.
User: The names of the compounds FeS, NaCl, NaOH, and Pb(CN)2 all end in the suffix
A. -ite.
B. -ic.
C. -ide.
D. -ate.
Weegy: The names of the compounds FeS, NaCl, NaOH, and Pb(CN)2 all end in the suffix -ide.
User: Which one of the following groups of chemical ...
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