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Periodic Table
Periodic Table
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7th grade test over general periodic table properties
Flashcards
28 cards
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Questions
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Answers
1
Which particles in atoms have a negative electric charge?
nuclei
neutrons
protons
electrons
2
The horizontal rows in the periodic table are known as groups.
False
True
3
Which group contains the most elements?
nonmetals
metalloids
metals
transition elements
4
Which of these statements about a column of the periodic table is true?
The elements have similar properties.
The elements have a wide range of properties.
The elements have the same atomic mass.
The elements have the same atomic number.
5
How did chemists change Mendeleev's periodic table in the early 1900's?
They included chemical properties such as bonding power
They used atomic mass instead of atomic number
They used atomic number instead of atomic mass
They included physical properties such as melting point
6
Which parts of the atom move around the nucleus?
neutrons
electrons
atomic mass units
protons
7
Mendeleev arranged the elements in order of increasing ________.
isotopes
atomic mass
atomic numbers
symbols
8
The elements in a group of the periodic table have similar characteristics.
True
False
9
Nonmetals can be found on the left side of the periodic table.
False
True
10
Mendeleev created the first periodic table by arranging elements in order of
decreasing atomic mass
increasing melting points and densities
increasing atomic mass
increasing atomic number
11
In general, which of the following statements about metals is true?
Metals need to be stored in sealed containers for safety.
Metals are highly reactive substances.
Metals show a wide variety of chemical properties.
Metals do not react with oxygen.
12
The property of an element that indicates the number of protons in its atoms is the _____.
atomic number
symbol
isotopes
atomic mass
13
In the 1800s, Mendeleev organized the first truly useful _____.
periodic table
element
14
The atomic number of an element is based on the
number of protons in its nucleus
mass of the nucleus
number of neutrons in its nucleus
number of electrons around its core
15
From an element's location in the periodic table, you can predict
its properties
when it was discovered
its chemical name
its chemical symbol
16
Each element is given a specific _____ that usually consists of 1 or 2 letters.
symbol
periodic table
17
The _____ is the very small center core of an atom.
symbol
nucleus
18
Most metals are NOT
good conductors of heat and electricity
ductile
malleable
liquid at room temperature
19
The elements in a row of the periodic table
have the same or nearly the same properties
have properties that change in a pattern
have the same average atomic mass
are in the same family
20
The elements in a column of the periodic table
have very similar chemical symbols
have similar properties
have the same atomic mass
are in the same period
21
Which group of elements shares characteristics with both metals and nonmetals?
salts
halogens
alloys
metalloids
22
In an atom, the number of protons equals the number of
isotopes
electrons
nuclei
neutrons
23
A column of elements in the periodic table is called a group, or _____.
period
family
24
An element's _____ can be predicted from its location on the periodic table.
symbol
properties
25
Protons have no charge; they are neutral.
True
False
26
The modern periodic table is organized according to atomic mass.
False
True
27
Because atoms are so small,
they cannot be synthesized by scientists.
there is no way to describe them.
they cannot be made of smaller particles.
scientists create models to describe them.
28
What information in the periodic table indicates the number of protons in an atom?
the element's chemical symbol
the element's atomic mass
the element's atomic number
the position of the element in its column
