Figure 5-1 shows a portion of a blank periodic table. Identify the segments labeled A and B.

A is a period and B is a group.

Which statement is true about the metalloid silicon?

Silicon is a better conductor of an electric current than sulfur

The tendency of an element to react chemically is closely related to

the number of valence electrons in atoms of the element.

How is the atomic mass of an element determined?

Take a weighted average of the masses of the isotopes present in nature.

The usefulness of Mendeleev’s periodic table was confirmed by

the discovery of elements with predicted properties.

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Chapter 5 Review - The Periodic Table

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Answers

1
Which element is found in most of the compounds in your body except for water?
potassium
iron
iodine
carbon
2
Which of the following gases emit colors when an electric current is applied?
fluorine and chlorine
helium and neon
hydrogen and helium
oxygen and nitrogen
3
Which of these Group 17 elements is the most reactive?
F (fluorine)
Cl (chlorine)
I (iodine)
Br (bromine)
4
Figure 5-1 shows a portion of a blank periodic table. Identify the segments labeled A and B.
A is a group and B is a period.
A and B are both periods
A is a period and B is a group.
A and B are both groups.
5
Which of these Group 1 elements is the most reactive?
K (potassium)
Li (lithium)
Na (sodium)
Cs (cesium)
6
One-twelfth the mass of a carbon-12 atom is used to define a(an)
atomic mass number
atomic mass
atomic number
atomic mass unit (amu)
7
Which statement is true about the metalloid silicon?
Silicon is a better conductor of an electric current than silver
Silicon does not conduct electric current under any conditions.
Silicon’s ability to conduct an electricity does not vary with temperature
Silicon is a better conductor of an electric current than sulfur
8
As you move from left to right across a period, the number of valence electrons
increases
stays the same
decreases
increases then decreases
9
Compared with Group 1 elements, Group 17 elements have
fewer valence electrons.
more atoms in ground state.
more valence electrons.
more isotopes.
10
The tendency of an element to react chemically is closely related to
attractions between its atoms.
its atomic mass.
the ratio of protons to neutrons in atoms of the element.
the number of valence electrons in atoms of the element.
11
How is the atomic mass of an element determined?
Average the atomic masses of all its isotopes.
Use the atomic mass of the most abundant isotope
Count the number of protons and neutrons in an atom of the element.
Take a weighted average of the masses of the isotopes present in nature.
12
In a periodic table, a set of properties repeats from
row to row.
group to group.
column to column.
element to element.
13
Which list of elements contains only metals?
helium, carbon, gold
phosphorus, nitrogen, oxygen
iodine, iron, nickel
sodium, chromium, copper
14
The usefulness of Mendeleev’s periodic table was confirmed by
the discovery of subatomic particles.
the discovery of the nucleus.
the discovery of subatomic particles.
the discovery of elements with predicted properties.
15
The column on the far left of the periodic table contains the
least reactive metals.
least reactive nonmetals.
most reactive nonmetals.
most reactive metals.

Chapter 5 Review - The Periodic Table Flashcards | StudBud