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- Periodic table 1 refers to the first group or column of the periodic table, which contains hydrogen and the alkali metals12. The elements in this group have one electron in their outermost shell, which makes them highly reactive12. Hydrogen is the first element on the periodic table, with an atomic number of 1, meaning it has one proton in its nucleus3. Hydrogen is not a metal, unlike the other elements in group 12.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Alkali metals group is the very first group (group 1) on the periodic table. The elements included in the Alkali metals group are; Lithium (Li) Sodium (Na) Potassium (K) Rubidium (Rb) Cesium (Cs) Francium (Fr)periodictableguide.com/periodic-table-groups/a Group 1 is composed of hydrogen (H) and the alkali metals. Elements of the group have one s-electron in the outer electron shell. Hydrogen is not considered to be an alkali metal as it is not a metal, though it is more analogous to them than any other group. This makes the group somewhat exceptional.en.wikipedia.org/wiki/Periodic_tableHydrogen is the element that is atomic number 1 on the periodic table. The element number or atomic number is the number of protons present in the atom. Each hydrogen atom has one proton, which means it has a +1 effective nuclear charge.www.thoughtco.com/atomic-number-1-on-periodic-t…
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About Periodic TableWhat Are the First 20 Elements – Names and Symbols
Interactive Periodic Table of the Elements
This is an interactive periodic table of the elements showing their atomic weights, atomic numbers, electron configurations, and state at room temperature.
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Facts About Hydrogen, Atomic #1 on the Periodic Table
Mar 11, 2019 · Hydrogen is the element that is atomic number 1 on the periodic table. The element number or atomic number is the number of protons present in the atom. Each hydrogen atom has one proton, which means it has a +1 …
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