AnswersMadison 2017 Phy Sci A-35 SSChemical Bonding

Chemical Bonding Answers

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Helium (He) and neon (Ne) are elements in Group 8A of the periodic table. How do the electron dot diagrams of these elements compare?

A
The electron dot diagram of helium has six fewer dots than the electron dot diagram of neon.
B
The electron dot diagram of helium has eight fewer dots than the electron dot diagram of neon.
C
Both the electron dot diagram of helium and the electron dot diagram of neon have two dots.
D
Both the electron dot diagram of helium and the electron dot diagram of neon have eight dots.
2
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Based on the location of nitrogen (N) on the periodic table, how many additional electrons does a nitrogen atom need in its valence shell to satisfy the octet rule when it forms bonds?

A
one
B
three
C
five
D
eight
3

What information on the periodic table is used to complete electron dot diagrams?

A
The number before the A at the top of a column shows how many dots to draw in the diagram.
B
The number before the B at the top of a column shows how many dots to draw in the diagram.
C
The number at the left of each row shows the number of valence electrons that are in atoms of elements in that row.
D
The number at the left of each row shows how many dots to draw above the symbol for elements in that row.
4

How many dots belong in the electron dot diagram of a boron (B) atom?

A
three
B
five
C
eight
D
thirteen
5

Hee Sun drew an electron dot diagram of a silicon atom as shown.

Question illustration
A
The dot to the left of the symbol would be removed in the diagram for carbon.
B
The same number of dots would appear in the diagram for carbon.
C
There would be two dots above and to the right of the symbol in the diagram for carbon.
D
The single dots would be replaced with two dots on each side of the symbol in the diagram for carbon.
6

Helium (He) and neon (Ne) are elements in Group 8A of the periodic table. How do the electron dot diagrams of these elements compare?

A
The electron dot diagram of helium has six fewer dots than the electron dot diagram of neon.
B
The electron dot diagram of helium has eight fewer dots than the electron dot diagram of neon.
C
Both the electron dot diagram of helium and the electron dot diagram of neon have two dots.
D
Both the electron dot diagram of helium and the electron dot diagram of neon have eight dots.
7

Which pairs of elements do not have to satisfy the octet rule for stability?

A
potassium (K) and sodium (Na)
B
neon (Ne) and argon (Ar)
C
oxygen (O) and fluorine (F)
D
helium (He) and hydrogen (H)
8

When sodium atoms (Na) and chlorine atoms (Cl) join to make sodium chloride, or table salt, they form an ionic bond. Using this information, which pair of elements is most likely to form an ionic bond?

A
potassium (K) and fluorine (F)
B
aluminum (Al) and aluminum (Al)
C
sulfur (S) and oxygen (O)
D
calcium (Ca) and neon (Ne)
9

The electron dot diagram shows the arrangement of dots without identifying the element.

Question illustration
A
boron (B)
B
neon (Ne)
C
rubidium (Rb)
D
arsenic (As)
10

Which is a force that holds atoms together?

A
chemical bond
B
electron shell
C
valence electron
D
chemical formula

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