Textbook QuestionIn which of the periodic groups 1A, 2A, 5A, and 7A is the first letter of all elements' symbol the same as the first letter of their name?
Textbook QuestionConsider the stable elements through lead (Z = 82). In how many instances are the atomic weights of the elements out of order relative to the atomic numbers of the elements?
Textbook QuestionThe subscript giving the atomic number of an atom is often left off when writing an isotope symbol. For example, 6 often written simply as 13C. Why is this allowed?
Textbook QuestionGive the names and symbols for the following elements:(a) An element with atomic number 6 (b) An element with 18 protons in its nucleus (c) An element with 23 electrons
Open QuestionWhich element is placed in the same period as ruthenium but has a higher atomic number than it?