2. Atoms & Elements

Which element has 78 protons in its nucleus?

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

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

Which of the following is the atomic symbol for gold?

Which of the following is the atomic number of aluminum (Al)?

Which of the following elements has a two-letter symbol on the periodic table?

Which element, represented by the symbol Ne, is commonly used in bright flashing advertising signs?

Which series on the periodic table contains the elements with atomic numbers 58 through 71?

How many protons are present in an atom of silicon (Si)?

Which of the following lists correctly shows the chemical symbols for the first 18 elements of the periodic table in order?

Which of the following is the atomic number of helium?

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?