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Elements & the Periodic Table Flashcards | StudBud
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Elements & the Periodic Table
Elements & the Periodic Table
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review of elements and periodic table structure
Flashcards
27 cards
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Questions
27
Answers
1
In an atom, the number of protons equals the number of ____.
nuclei
isotopes
neutrons
electrons
2
Fluorine, chlorine, bromine and iodine are part of a family called _____.
halogens
metalloids
alkali metals
noble gases
3
Which of the following statements about metals is true?
Metals show a wide range of chemical properties
Metals are highly reactive
Metals need to be stored in sealed containers for safety
Metals do not react with oxygen
4
Why would it be difficult to determine the properties of a new synthetic element?
The element's nuclei would break apart very quickly
The element would not fit in the periodic table
The element would combine the properties of the nuclei
The element would lack properties of ordinary elements
5
Which group contains the most elements?
metalloids
transition elements
non-metals
metals
6
Which group of elements share characteristics with both metals and non-metals?
halogens
lanthanides
salts
metalloids
7
What natural event provides enough energy to create elements through nuclear fusion?
a particle accelerator
a supernova
a nebula
a plasma
8
Which particles in atoms have a negative electric charge?
electrons
neutrons
nucleus
protons
9
How does the atomic mass of the elements change as you move from top to bottom on the table?
Stays the same
Mass increases
Mass decreases
10
What is an isotope?
an atom with a different number of protons than its neutrons
an atom with a different number of neutrons than its protons
an atom with different numbers of neutrons and electrons
an atom with a different number of electrons than protons
11
Which of the following is NOT a property common to non-metals?
brittle
dull
reactive with other elements
conduct electricity easily
12
In an atom, the number of protons equals the number of ____.
nuclei
isotopes
electrons
neutrons
13
The sun is made of mostly what element?
iron
hydrogen
carbon
oxygen
14
Which of the following scientists inferred that an atom's positive charge is in the nucleus?
Ernest Rutherford
John Dalton
J.J. Thompson
Niels Bohr
15
If an atom has 15 electrons, how many protons will it have?
15
20
0
30
16
How does the reactivity of elements change as you move from left to right on the table?
Increases Reactivity
Doesn't change
Decreases reactivity
17
What information in the periodic table indicates the number of protons in an atom?
the element's chemical symbol
the element's atomic number
the position of the element in the column
the element's atomic mass
18
The elements that do not ordinarily form compounds are ______.
halogens
elements in the carbon family
noble gases
metals
19
Mendeleev created the first periodic table by arranging the elements in order of _____.
increasing atomic mass
decreasing atomic mass
increasing melting points and densities
increasing atomic number
20
How did chemists change Mendeleev's periodic table?
The included chemical properties like bonding power.
They included physical properties like density.
They used atomic mass instead of atomic number.
The used atomic number instead of atomic mass.
21
What is unique about noble gases?
exist as solid elements
Don't form compounds
Are non-reactive
form salts
22
The elements in a column of the periodic table ____.
have similar chemical symbols
have the same atomic mass
are in the same period
have similar properties
23
Sodium has 11 protons, 12 neutrons and 11 electrons. What is it's mass number?
11
22
23
12
24
Which of the following statements about transition metals is true?
They are the most reactive of all types of metals
They are so soft they can be cut with a knife
They are never found uncombined in nature
They include metals such as gold, silver and copper
25
In the periodic table, the most reactive elements are found in _____.
Group 1, the first column on left
Groups 13-16 in the center
Period 1, the first row on the top
Periods 6 & 7 at the bottom
26
Sodium has 11 protons, 12 neutrons and 11 electrons. What is it's atomic number?
22
23
11
12
27
A material is ductile if it _____.
can transfer heat or electricity to another metal
is a mixture of metal with at least one other element
can be hammered or rolled into flat sheets
can be pulled or drawn into a long wire
