Question

21

Multiple Choice
2.5 points



Question at position 21

The number of valence electrons in Group 17 elements is


7


8


17


18

Question at position 22
22

Multiple Choice
2.5 points



Question at position 22

A chemical bond results from the mutual attraction of the nuclei of atoms and


electrons


protons


neutrons


dipoles

Question at position 23
23

Multiple Choice
2.5 points



Question at position 23

Atoms are ____ when they are combined


more stable


less stable


not bound together


with a higher energy state.

Question at position 24
24

Multiple Choice
2.5 points



Question at position 24

A chemical bond resulting from the electrostatic attraction between positive and negative ions is called a(n)


covalent bond


ionic bond


charged bond


electron configuration

Question at position 25
25

Multiple Choice
2.5 points



Question at position 25

A covalent bond results when ____ are shared.


protons


neutrons


electrons


dot strucutres

Question at position 26
26

Multiple Choice
2.5 points



Question at position 26

A neutral group of atoms held together by covalent bonds is called _____.


Atom


Nucleus


Molecule


Electron

Question at position 27
27

Multiple Choice
2.5 points



Question at position 27

Which of the following is NOT an example of a molecular formula?


H20


NH3


Mn


O2

Question at position 28
28

Multiple Choice
2.5 points



Question at position 28

In a molecule of fluorine, the two shared electrons give each fluorine atom ____ electron(s) in the outer energy level.


1


2


8


32

Question at position 29
29

Multiple Choice
2.5 points



Question at position 29

The octet rule states that chemical compounds tend to form so that each atom has an octet of electrons in


Highest occupied energy level


1s orbital


d orbital


s orbital

Question at position 30
30

Multiple Choice
2.5 points



Question at position 30

To draw a Lewis structure, one must know the


number of valence electrons in each atom.


atomic mass of each atom.


bond length of each atom


ionization energy of each atom.

Answer 1

21. 7

22. electrons

23. more stable

24. ionic bond

25. electrons

26. Molecule

27. Mn

28. 8

29. Highest occupied energy level

30. number of valence electrons in each atom