Valence Electrons of Elements

How many core and valence electrons does an atom of bromine possess? A. 18 core, 17 valence B. 28 core, 7 valence C. 30 core, 5 valence D. 20 core, 15 valence E. 10 core, 25 valence

Which element has an outer electron configuration of ns 2np4? 1. Se 2. Mo 3. Si 4. Fe

Which element has the fewest number of valence electrons? a) Rb b) Se c) Ba d) Br e) Ge

The partial orbital diagram below (where n could be any valid quantum number) describes the valence electrons for which of the atoms below? (a) Nitrogen (b) Silicon (c) Bromine (d) Sulfur (e) Gallium  

How many inner shell (core) electrons do the following elements have, respectively? Hydrogen, Helium, Lithium and Berylium (A) 1, 1, 1, 1 (B) 0, 0, 1, 1 (C) 0, 0, 2, 1 (D) 0, 0, 2, 2 (E) 2, 2, 2, 2

How many core electrons does an atom of bromine have? a) 35 b) 36 c) 30 d) 28 e) 18

What is the valence electron configuration for the element in Period 5, Group 3A? (A) 5s25p1 (B) 3s23p5 (C) 3s23p3 (D) 5s25p3

Which atom below contains the greatest number of valence electrons? A. Se B S C. Mo D. U E. All of the above contain the same number of valence electrons

What is the valence-shell electron configuration for the shaded group in the periodic table given below? a) ns2(n-2)f2  b) ns4  c) ns2(n-1)d2  d) ns2np2 e) ns2nd2

Which of the atoms listed below has a total of only four valence electrons?(a) Beryllium(b) Carbon(c) Nitrogen(d) Oxygen(e) Fluorine

Give the number of valence electrons for cobalt (Co).a.  18b.  27c.  2d.  9e.  7

How many valence electrons does an atom of arsenic have?a) 3b) 33c) 15d) 5e) 8

How many valence electrons does an antimony (Sb) atom have? a) 1b) 3c) 5d) 7e) 51

For each element, indicate the number of valence electrons, core electrons, and unpaired electrons in the ground state: (b) phosphorus

For each element, indicate the number of valence electrons, core electrons, and unpaired electrons in the ground state: (c) neon

How many valence electrons does an atom Sn have? A. 2 B. 4 C.14 D. 46 E. 50

Consider an atom of sulfur. Indicate whether the statement about an atom of sulfur is true.It has 6 valence electrons.

Which of the following have their valence electrons in the same shell?a) Mg, Al, Clb) B, Si, Asc) N, As, Bid) He, Ne, F

How many valence electrons are in an atom of phosphorus and an atom of selenium?(A) Phosphorus has 3; selenium has 4(B) Phosphorus has 5; selenium has 1(C) Phosphorus has 5; selenium has 6(D) Phosphorus has 15; selenium has 34(E) Phosphorus has 3; selenium has 6

An atom has 7 valence electrons – 2 are in an s-subshell and 5 in a p-subshell. Which group is the atom in?(A) alkali metals(B) alkaline earth metals(C) pnictogens(D) chalcogens(E) halogens

How many valence electrons does an oxygen (O) atom have? (You can determine the number of valence electrons by referring to the group number on the periodic table or by writing its electron configuration. For main group elements, the electrons past the noble gas core are the valence electrons.)a) 0b) 2c) 4d) 6e) 8

Determine the number of valence electrons for each of the following three elements. Express your answer as an integer. a. AIb. Snc. Br

Determine the number of valence electrons for each of the following four elements.GaPbClN

Which of the following atoms or ions does not have a filled outer subshell?a. Cab. Sc. Zn2+d. S2-e. Ca2+

An atom of chlorine has several valence electrons in itsa. first shell. b. second shell. c. nucleus. d. third shell.

For each element, indicate the number of valence electrons, core electrons, and unpaired electrons in the ground state: (a) carbon