The number of electrons in the innermost shell of lithium (atomic number 3)?
singleAnswer
2
Electron shell
The number of electrons in the innermost shell of lithium (atomic number 3)?
Electron shell Period 2 element Bohr model Effective atomic number Electron configuration Octet rule Period 3 element Period (periodic table) Alkaline earth metal Alkali metal
In chemistry and <b>atomic</b> physics, an electron <b>shell</b>, or a principal energy level, 
may be thought ... The <b>shells</b> correspond to the principal quantum <b>numbers</b> (n = 1
, 2, <b>3</b>, 4 . ... Each <b>shell</b> can contain only a fixed <b>number of electrons</b>: The first <b>shell</b> 
can hold up to two electrons, the <b>second shell</b> can hold up to ... <b>3</b>, <b>Lithium</b>, 2, 1, 1. A period 2 element is one of the chemical elements in the <b>second</b> row (or period) 
of the periodic ... <b>Lithium</b> (Li) is an alkali metal with <b>atomic number 3</b>, occurring 
naturally in two isotopes: <sup>6</sup>Li and <sup>7</sup>Li. The two make up ... In ionic compounds, 
beryllium loses its two valence <b>electrons</b> to form the cation, Be<sup>2+</sup>. Small amounts 
of&nbsp;... In <b>atomic</b> physics, the Rutherford–Bohr model or Bohr model, presented by Niels 
Bohr and ... where n = 1, 2, <b>3</b>, ... is called the principal quantum <b>number</b>, and ħ = 
h/2π. ... For example, the <b>lithium atom</b> has two <b>electrons</b> in the lowest 1s orbit, 
and ... At that time, he thought that the postulated <b>innermost</b> &quot;K&quot; <b>shell</b> of <b>electrons</b>
&nbsp;... For instance, <b>lithium</b>, <b>atomic number 3</b>, has two <b>electrons</b> in the 1s <b>shell</b> and one 
in the 2s <b>shell</b>. Because the two 1s <b>electrons</b> screen the protons to give an&nbsp;... A Bohr diagram of <b>lithium</b>. In atomic physics and quantum chemistry, the electron 
configuration is the distribution of ... <b>The numbers of electrons</b> that can occupy 
each <b>shell</b> and each subshell arise from the equations of quantum mechanics, in 
particular ... Phosphorus (<b>atomic number</b> 15) is as follows: 1s<sup>2</sup> 2s<sup>2</sup> 2p<sup>6</sup> 3s<sup>2</sup> 3p<sup><b>3</b></sup>. The octet rule is a chemical rule of thumb that reflects the observation that 
elements tend to ... A chlorine <b>atom</b> has seven <b>electrons</b> in its outer <b>electron shell</b>, 
the first and ... <b>number</b> to a concept of valence in which he distinguished <b>atoms</b> 
as <b>electron</b> ... These molecules utilize <b>three</b>-centered bonding (3c-2e); for 
example,&nbsp;... A period <b>3</b> element is one of the chemical elements in the third row (or period) of 
the periodic table of the chemical elements. The periodic table is laid out in rows 
to illustrate recurring (periodic) trends in the chemical behaviour of the elements 
as their <b>atomic number</b> increases: ... The complete octet (eight <b>electrons</b>) in the 
outer atomic <b>shell</b> makes argon&nbsp;... A period in the periodic table is a row of chemical elements. All elements in a row 
have the same <b>number of electron shells</b>. ... For example, the halogens lie in the 
<b>second</b>-last column (group 17) and ... As <b>atomic number</b> increases, <b>shells</b> fill with 
electrons in approximately the order shown at right. ... <b>Lithium</b> at WebElements. <b>Atomic number</b> color: black=solid. v &middot; t &middot; e. The alkaline earth metals are six 
chemical elements in group 2 of the periodic table. They are ... The <b>second</b> 
ionization energy of all of the alkaline metals is also somewhat low. ... All the 
alkaline earth metals have two <b>electrons</b> in their valence <b>shell</b>, so the 
energetically preferred&nbsp;... The alkali metals consist of the chemical elements <b>lithium</b> (Li), sodium (Na), 
potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). Together with 
hydrogen they comprise group 1, which lies in the s-block of the periodic table. 
All alkali metals have their outermost <b>electron</b> in an s-orbital: this shared ... The 
Oddo–Harkins rule holds that elements with even <b>atomic numbers</b> are&nbsp;...
1
Electron shell