Stanley Merzman, Discover Magazine, 21 Aug. 2018 Adding another, to make cerium, atomic number 58, adds an electron to the fourth circle. Bill Andrews, Discover Magazine, 26 June 2019 Even the rarest rare earth, thulium, with atomic number 69, is 125 times more common than gold. 2023 Many periodic tables include the atomic number (number of protons) and atomic weight (which depends on protons and neutrons). 2022 What’s the atomic number of Rolex? - Charles Curkin, ELLE Decor, 6 Apr. Cody Cottier, Discover Magazine, 12 Apr. James Sullivan,, 8 June 2023 Though no one is sure how many elements exist, atomic number 119 will be the first in a new row - a new period - that could extend all the way to 172. 2023 Each box and square with the atomic number just reminded me of another window with some family back there. Ashraya Gupta, Scientific American, 7 Sep.
Recent Examples on the Web Katie Hafner: Uranium is the last of the naturally occurring elements on the periodic table, with an atomic number of 92.
