AnswersChemistry Honors AElectrons and the Periodic Table

Electrons and the Periodic Table Answers

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What is the number of valence electrons in cadmium (Cd)?

A
1
B
2
C
10
D
12
2
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Which is the electron configuration for nobelium (No)?

A
[Rn]7s25f14
B
[Rn]7s25f7
C
[Ne]3s23p7
D
[Xe]6s25d1
3

It is easier to determine the electron configurations for the p-block elements in periods 1, 2, and 3 than to determine the electron configurations for the rest of the p-block elements in the periodic table because

A
they have a larger number of core electrons.
B
their electrons are assigned to s and p orbitals only.
C
their electrons are placed in a higher number of orbitals.
D
they have more valence electrons available for bonding.
4

The electron configuration of nitrogen (N) is

A
1s22s22p3
B
1s22s22p4
C
1s22s22p5
D
1s22s22p6
5

Which of these elements has an electron configuration of [Kr]5s2?

A
barium
B
calcium
C
rubidium
D
strontium
6

How many valence electrons does lithium (Li) have available for bonding?

A
1
B
2
C
3
D
4
7

The noble-gas notation for tin (Sn) will contain the symbol

A
[Ar].
B
[Kr].
C
[Xe].
D
[Rn].
8

Which is the noble-gas notation for lead (Pb)?

A
[Rn]6s24f145d106p2
B
[Rn]6s25d106p2
C
[Xe]6s24f145d106p2
D
[Xe]6s25d106p2
9

In which block of the periodic table is chromium (Cr) found?

A
s block
B
d block
C
p block
D
f block
10

In which block of the periodic table is uranium (U) found?

A
s block
B
d block
C
p block
D
f block

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