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Chapter 3 Study Guide!
Chapter 3 Study Guide!
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Chapter 3 Study Guide (Integrated Science, grade 8) - Atoms and the Periodic Table.
Flashcards
21 cards
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Questions
21
Answers
1
Which group of elements share characteristics with both metals and nonmetals?
transition elements
alloys
metalloids
halogens
2
True or False: The horizontal rows in the periodic table are known as <u>periods</u>.
True
False, groups
3
What is the total number of electrons in an atom of sodium?
11
12
23
25
4
True or False: Fusion is the process in which existing nuclei <u>split</u> and make new nuclei.
False, combine
True
5
The element silicon is removed from this table (between Al & P). What is its atomic number?
16
14
11
8
6
What is the atomic number of aluminum?
27
14
13
12
7
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 range of chemical properties.
Metals do not react with oxygen.
8
True or False: An atom consists of a <u>neutron</u> surrounded by one or more electrons.
True
False, Nucleus
9
The modern periodic table is arranged in order of increasing
number of neutrons.
atomic number.
number of valence electrons
atomic mass.
10
How many neutrons are in an atom of magnesium?
24
15
12
14
11
Which group of elements have two valence electrons in their atoms?
metal alloys
alkali metals
alkaline earth metals
transition metals
12
Mendeleev created the first periodic table by arranging elements in order of
increasing densities.
increasing atomic number.
decreasing atomic mass.
increasing atomic mass.
13
In a period of eight elements in the periodic table, the properties of those elements
are related to the number of valence electrons.
do not show any pattern.
are exactly the same.
are extremely similar to one another.
14
True or False: The most chemically active metals are in <u>Group 18</u> of the periodic table.
True
False, Group 1
15
How many protons are in an atom of phosphorus?
16
15
14
31
16
What is the greatest number of valence electrons an atom can have?
8
100
1
5
17
What is the atomic mass of sodium?
12
24
11
23
18
Which of the following have the same number of valence electrons?
the elements having similar atomic numbers
the elements having similar atomic masses
the elements in a group
the elements in a period
19
From an element's location in the periodic table, you can predict
its properties.
its chemical name.
its chemical symbol.
when it was discovered.
20
True or False: When a metal is <u>malleable</u>, it can be pounded into a new shape.
True
False, brittle
21
Where are nonmetals located on the periodic table?
to the right of the zigzag line.
in the bottom two rows.
to the left of the zigzag line.
in Groups 1 through 4.
