Why would it probably be very difficult to determine the properties of a newly discovered synthetic element?

The element’s nuclei would break apart very quickly.

A material is said to be ductile if it

can be pulled out, or drawn, into a long wire.

In general, which of the following statements about metals is true?

Metals show a wide range of chemical properties.

How did chemists change Mendeleev’s periodic table in the early 1900s?

They used atomic number instead of atomic mass to organize the elements.

What prediction did Mendeleev make that came true less than 20 years later?

Said that 3 new elements will be discovered, and described their properties

The elements in a row of the periodic table

have properties that change in a pattern.

Because atoms are so small,

scientists create models to describe them.

Which of these statements about a column of the periodic table is true?

The elements have similar properties.

In the periodic table, the most reactive metals are found

in Group 1, the first column on the left.

The atomic number of an element is based on the

number of protons in its nucleus.

Which of the following statements about transition metals is true?

They include familiar metals such as gold, silver, copper, and nickel.

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Periodic Table

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Questions 28

Answers

1
The elements in a column of the periodic table
have similar properties.
have very similar chemical symbols.
are in the same period.
have the same atomic mass.
2
Why would it probably be very difficult to determine the properties of a newly discovered synthetic element?
The element would lack many properties of ordinary elements.
Element would combine the properties of the nuclei from which it was made.
The element would not fit in the periodic table.
The element’s nuclei would break apart very quickly.
3
A material is said to be ductile if it
can transfer heat or electricity to another material.
can be hammered or rolled into flat sheets and other shapes.
is a mixture of a metal with at least one other element.
can be pulled out, or drawn, into a long wire.
4
The sun is made up mostly of
hydrogen.
iron.
carbon.
beryllium.
5
The elements that do not ordinarily form compounds are
noble gases.
elements in the carbon family.
halogens.
metals.
6
Most metals are NOT
malleable.
good conductors of heat and electricity.
liquid at room temperature.
ductile.
7
Which group of elements shares characteristics with both metals and nonmetals?
alloys
halogens
salts
metalloids
8
Fluorine, chlorine, bromine, and iodine are part of a family called
noble gases.
halogens.
alkali metals.
metalloids.
9
In general, which of the following statements about metals is true?
Metals do not react with oxygen.
Metals are highly reactive substances.
Metals show a wide range of chemical properties.
Metals need to be stored in sealed containers for safety.
10
How did chemists change Mendeleev’s periodic table in the early 1900s?
They included chemical properties such as bonding power.
They used atomic number instead of atomic mass to organize the elements.
They used atomic mass instead of atomic number to organize the elements.
They included physical properties such as melting point and density.
11
Which group contains the most elements?
metals
nonmetals
metalloids
transition elements
12
At room temperature, more than half of the nonmetal elements are
liquids.
gases.
alloys.
solids.
13
What prediction did Mendeleev make that came true less than 20 years later?
He said that the periodic table would be developed into 18 families
He predicted that a total of 112 elements would be discovered
He predicted the atomic numbers of unknown elements
Said that 3 new elements will be discovered, and described their properties
14
The elements in a row of the periodic table
have the same or nearly the same properties.
are in the same family.
have the same average atomic mass.
have properties that change in a pattern.
15
Because atoms are so small,
there is no way to describe them.
they cannot be made of smaller particles.
scientists create models to describe them.
they cannot be synthesized by scientists.
16
Which parts of the atom move around the nucleus?
protons
neutrons
atomic mass units
electrons
17
Which of these statements about a column of the periodic table is true?
The elements have the same atomic mass.
The elements have the same atomic number.
The elements have similar properties.
The elements have a wide range of properties.
18
In the periodic table, the most reactive metals are found
in Period 1, the first row across the top.
in Groups 13 through 16 in the center.
in Periods 6 and 7 at the bottom.
in Group 1, the first column on the left.
19
The atomic number of an element is based on the
mass of its nucleus.
number of neutrons in its nucleus.
number of protons in its nucleus.
number of electrons around its core.
20
To make most synthetic elements, scientists use powerful machines called
semiconductors.
supernovae.
nebulas.
particle accelerators.
21
From an element’s location in the periodic table, you can predict
its chemical symbol.
its properties.
its chemical name.
when it was discovered.
22
Mendeleev created the first periodic table by arranging elements in order of
increasing atomic number.
increasing atomic mass.
increasing melting points and densities.
decreasing atomic mass.
23
Which property of bromine could you NOT predict based on the fact that it is a nonmetal in the halogen family?
poor conductor of heat
highly reactive
liquid at room temperature
poor conductor of electricity
24
What information in the periodic table indicates the number of protons in an atom?
the element’s atomic number
the element’s atomic mass
the position of the element in its column
the element’s chemical symbol
25
Which particles in atoms have a negative electric charge?
protons
nuclei
neutrons
electrons
26
In an atom, the number of protons equals the number of
neutrons.
Isotopes.
nuclei.
electrons.
27
The two most common alkaline earth metals are
sodium and potassium.
iron and silver.
copper and zinc.
calcium and magnesium.
28
Which of the following statements about transition metals is true?
They are the most reactive of all the types of metals.
They include familiar metals such as gold, silver, copper, and nickel.
They are never found uncombined in nature.
They are so soft that they can be cut with an ordinary knife.

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