What is the 1st element in the periodic table?
singleAnswer
H Hydrogen
Periodic table
1st element in the periodic table
Periodic table History of the periodic table Block (periodic table) Timeline of chemical element discoveries Synthetic element Alkali metal Period 1 element Extended periodic table Period (periodic table) Ionization energy
The <b>first</b> 94 <b>elements</b> occur naturally; the remaining 24, americium to oganesson 
(95–118), occur only when&nbsp;... <b>First</b> categorizations[edit]. The history of the <b>periodic table</b> is also a history of the 
discovery of the chemical <b>elements</b>. The <b>first</b>&nbsp;... A block of the <b>periodic table</b> is a set of chemical <b>elements</b> having their 
differentiating electrons ... <b>element</b> in group 18, is not included in the p-block. 
Each row of the table has a place for six p-<b>elements</b> except for the <b>first</b> row (which 
has none). Each <b>element&#39;s</b> name, atomic number, year of <b>first</b> report, name of the discoverer, 
and notes related to the discovery are listed. Contents. 1 <b>Periodic table</b> of&nbsp;... The synthetic <b>elements</b> are those with atomic numbers 95–118, as shown in 
purple on the accompanying <b>periodic table</b>: these 24 <b>elements</b> were <b>first</b> created
&nbsp;... The alkali metals consist of the chemical <b>elements</b> lithium (Li), sodium (Na), 
potassium (K), ... Rubidium and caesium were the <b>first elements</b> to be discovered 
using the spectroscope, invented in 1859 by ... The next <b>element</b> below francium 
(eka-francium) in the <b>periodic table</b> would be ununennium (Uue), <b>element</b> 119. Position of period 1 <b>elements in the periodic table</b>[edit]. The <b>first</b> electron shell, n 
= 1, consists of&nbsp;... The <b>first element</b> of the g-block may have atomic number 121, and thus would 
have the systematic name unbiunium. Despite&nbsp;... The <b>first</b> period contains the least <b>elements</b> than any other, with only two, 
hydrogen and helium. They therefore do not follow the octet rule. Chemically, 
helium&nbsp;... In physics and chemistry, ionization energy (American English spelling) or 
ionisation energy ... Comparison of Ei of <b>elements in the periodic table</b> reveals 
two <b>periodic trends</b>: Ei generally increases as one moves from ... For example, 
the <b>first</b> three ionization energies are defined as follows: <b>1st</b> ionization energy. X 
→ X<sup>+</sup> + e<sup>−</sup>.
hydrogen
Periodic table