Give the electron configuration for an element with 19 electrons. How many valence electrons does this element have?

Expert Solution

answer : onyl one valency electron it has

explanation :

element with 19 electrons means its atomic number 19. so it is potassium .

electronic configuration of potassium = 1s²2s²2p⁶3s²3p⁶4s¹

in the outer most shell of potsiium contain one electron . so it is considered as valency electron.

so this element is placed in first group . all first group elements valency =1 (that is s¹)

queen_honey_blossom answered 2 years ago

How many valence electrons are there in an element with the following electron configuration? 1s2 2s2...

How many valence electrons are there in an element with the following electron configuration? 1s2 2s2 2p4 _______ has ____________ valence electrons

Give the valence electron configuration of the atom and monatomic ion of the element with the...

Give the valence electron configuration of the atom and monatomic ion of the element with the following ionization energies and name the elelment if its in the 3rd period. Explain why you make your selection: 1E1 1012 1E2 1900 1E3 2910 1E4 4960 IE5 6270 1E6 22200 1E7 27000 1E8 32500

How many valence electrons are in the element H?

TeF5- anion. a) How many valence electrons does Te have? b) How many valence electrons does...

TeF5- anion. a) How many valence electrons does Te have? b) How many valence electrons does F have? c) Write the Lewis structure of TeF5 - anion: d) Assign formal charges to each atom in the Lewis structure of the TeF5 - anion. e) What is the hybridization of the orbitals on the central atom in the anion TeF5 -? d) Predict the molecular geometry of the TeF5 - anion:

how many electrons does the element with Z = 12 have in its valence shell? write...

how many electrons does the element with Z = 12 have in its valence shell? write the electron dot symbol for this element

An unknown element is a nonmetal and has a valence electron configuration of ns2np4. a. How...

An unknown element is a nonmetal and has a valence electron configuration of ns2np4. a. How many valence electrons does this element have? b. What are some possible identities for this element? c. What is the formula of the compound this element would form with potassium? d. Would this element have a larger or smaller radius than barium? e. Would this element have greater or smaller ionization energy than fluorine?

Which element has a neon core and five valence electrons in its ground state electron configuration?

“Valence electrons” are electrons in the outermost shell of an atom. How many valence electrons does...

“Valence electrons” are electrons in the outermost shell of an atom. How many valence electrons does an aluminum atom have?

How many valence electrons does an atom of antimony, Z = 51, have? How many valence...

How many valence electrons does an atom of antimony, Z = 51, have? How many valence electrons does an atom of fluorine, Z = 9, have? How many valence electrons does an atom of sodium, Z = 11, have? How many valence electrons does an atom of aluminum, Z = 13, have?

How many valence electrons does the atom of V have?

Question