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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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Practice quiz
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Questions
27
Answers
1
Sodium has 11 protons, 12 neutrons and 11 electrons. What is it's mass number?
12
11
22
23
2
A material is ductile if it _____.
is a mixture of metal with at least one other element
can transfer heat or electricity to another metal
can be hammered or rolled into flat sheets
can be pulled or drawn into a long wire
3
The sun is made of mostly what element?
oxygen
hydrogen
carbon
iron
4
In the periodic table, the most reactive elements are found in _____.
Period 1, the first row on the top
Group 1, the first column on left
Groups 13-16 in the center
Periods 6 & 7 at the bottom
5
Which particles in atoms have a negative electric charge?
protons
nucleus
electrons
neutrons
6
In an atom, the number of protons equals the number of ____.
isotopes
neutrons
nuclei
electrons
7
Which of the following statements about metals is true?
All of them
Some metals are highly reactive
Some metals do not react with oxygen
Some metals need to be stored in sealed containers for safety
8
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 element's chemical symbol
the position of the element in the column
9
What is a half-life (in science)?
waves given off by radioactive material
the amount of time for half a radioactive sample to decay
a video game
half of an element
10
Fluorine, chlorine, bromine and iodine are part of a family called _____.
alkali metals
metalloids
halogens
noble gases
11
Why would it be difficult to determine the properties of a new synthetic element?
The element would lack properties of ordinary elements
The element would combine the properties of the nuclei
The element would not fit in the periodic table
The element's nuclei would break apart very quickly
12
What natural event provides enough energy to create elements through nuclear fusion?
a nebula
a particle accelerator
a supernova
a plasma
13
Which of the following is NOT a property common to non-metals?
conduct electricity easily
reactive with other elements
dull
brittle
14
Mendeleev created the first periodic table by arranging the elements in order of _____.
increasing melting points and densities
increasing atomic number
decreasing atomic mass
increasing atomic mass
15
How did chemists change Mendeleev's periodic table?
They included physical properties like density.
They used atomic mass instead of atomic number.
The included chemical properties like bonding power.
They used atomic number instead of atomic mass.
16
In an atom, the number of protons equals the number of ____.
nuclei
electrons
neutrons
isotopes
17
The elements that do not ordinarily form compounds are ______.
halogens
elements in the carbon family
metals
noble gases
18
What is unique about noble gases?
Are non-reactive
form salts
Don't form compounds
exist as solid elements
19
The elements in a column of the periodic table ____.
have the same atomic mass
have similar properties
have similar chemical symbols
are in the same period
20
What is an isotope?
an atom with a different number of electrons than protons
an atom with a different number of neutrons than its protons
an atom with a different number of protons than its neutrons
an atom with different numbers of neutrons and electrons
21
How does the reactivity of elements change as you move from left to right on the table?
Doesn't change
Decreases reactivity
Increases Reactivity
22
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
23
Sodium has 11 protons, 12 neutrons and 11 electrons. What is it's atomic number?
11
23
22
12
24
If an atom has 15 electrons, how many protons will it have?
15
20
0
30
25
Which group contains the most elements?
non-metals
transition elements
metals
metalloids
26
Which group of elements share characteristics with both metals and non-metals?
lanthanides
halogens
salts
metalloids
27
How does the atomic mass of the elements change as you move from top to bottom on the table?
Stays the same
Mass decreases
Mass increases
