2. Atoms & Elements

Which element has a molar mass of 30.974 g/mol?

Which element is in the same period as ruthenium (Ru) but has a higher atomic number than ruthenium?

Which of the following is the atomic number of silicon (Si)?

Which of the following best completes the statement: ________ of the known chemical elements are displayed in the periodic table?

A neutral atom of which element contains 10 electrons?

Silicon (Si) is located in period 3 of the periodic table. What does this indicate about silicon?

Which of the following is the correct chemical symbol for the element silver?

Which of the following is the correct chemical symbol for the element with atomic number 12 among the first 20 elements of the periodic table?

Which noble gas has the greatest atomic number?

Which element, represented by the symbol O, makes up the majority of the human body by mass?

Which of the following pieces of information is NOT typically provided in a standard periodic table?

Which of the following lists contains only the element symbols for metalloids?

Which of the following is the correct chemical symbol for an element on the periodic table?

How many protons are present in an atom of boron (symbol B) on the periodic table?

Which of the following is the correct chemical symbol for argon?