Answers26-27 WHS-Chemistry-1stSixWeeksAtomic Numbers and Electron Configurations

Electrons and the Periodic Table Answers

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

A
[Rn]6s24f145d106p2
B
[Rn]6s25d106p2
C
[Xe]6s24f145d106p2
D
[Xe]6s25d106p2
2
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The electron configuration of nitrogen (N) is

A
1s22s22p3
B
1s22s22p4
C
1s22s22p5
D
1s22s22p6
3

Which is the electron configuration for nobelium (No)?

A
[Rn]7s25f14
B
[Rn]7s25f7
C
[Ne]3s23p7
D
[Xe]6s25d1
4

Hydrogen reacts with an element to form a compound. Which element would have the most valence electrons available to react with hydrogen?

A
oxygen
B
chlorine
C
neon
D
nitrogen
5

Which statement describes the 3d, 4s, and 4p orbitals of Arsenic (As) based on its electronic configuration and position in the periodic table?

A
The 3d and 4s orbitals are completely filled, and the 4p orbital is partially filled.
B
The 3d orbital is completely filled, and the 4s and 4p orbitals are partially filled.
C
The 3d, 4s, and 4p orbitals are completely filled.
D
The 3d, 4s, and 4p orbitals are partially filled.
6

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

A
barium
B
calcium
C
rubidium
D
strontium
7

Which of the following elements has the fewest valence electrons?

A
beryllium
B
boron
C
carbon
D
lithium
8

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.
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

Which is the noble gas notation for chlorine?

A
[Ne] 4s2 4p5
B
[Ne] 3s2 3p5
C
[Ne] 3s2 3p3
D
[Ne] 3p2 3p5

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Electrons and the Periodic Table Answers — 26-27…