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Elements & the Periodic Table Flashcards | StudBud
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Elements & the Periodic Table
Elements & the Periodic Table
30 terms
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review of elements and periodic table structure
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
During radioactive decay, atomic nuclei of unstable isotopes _____.
give off nuclear radiation
are unchanged
form chemical bonds
are broken down by radioactive bacteria
2
Which of the following is NOT a property common to non-metals?
reactive with other elements
dull
brittle
conduct electricity easily
3
The sun is made of mostly what element?
iron
hydrogen
carbon
oxygen
4
If an atom has 15 electrons, how many protons will it have?
15
0
20
30
5
Sodium has 11 protons, 12 neutrons and 11 electrons. What is it's atomic number?
12
11
22
23
6
Mendeleev created the first periodic table by arranging the elements in order of _____.
increasing melting points and densities
decreasing atomic mass
increasing atomic mass
increasing atomic number
7
Sodium has 11 protons, 12 neutrons and 11 electrons. What is it's mass number?
12
23
22
11
8
What natural event provides enough energy to create elements through nuclear fusion?
a supernova
a particle accelerator
a nebula
a plasma
9
Which of the following statements about metals is true?
Metals are highly reactive
Metals do not react with oxygen
Metals show a wide range of chemical properties
Metals need to be stored in sealed containers for safety
10
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 the column
the element's chemical symbol
11
In the periodic table, the most reactive elements are found in _____.
Periods 6 & 7 at the bottom
Period 1, the first row on the top
Groups 13-16 in the center
Group 1, the first column on left
12
In an atom, the number of protons equals the number of ____.
electrons
nuclei
neutrons
isotopes
13
In an atom, the number of protons equals the number of ____.
electrons
isotopes
nuclei
neutrons
14
Which group contains the most elements?
transition elements
metals
non-metals
metalloids
15
A material is ductile if it _____.
is a mixture of metal with at least one other element
can be hammered or rolled into flat sheets
can transfer heat or electricity to another metal
can be pulled or drawn into a long wire
16
What is unique about noble gases?
Are non-reactive
Don't form compounds
form salts
exist as solid elements
17
A piece of paper will provide protection from _____.
gamma radiation
alpha radiation
beta radiation
gamma rays
18
How did chemists change Mendeleev's periodic table?
They included physical properties like density.
The used atomic number instead of atomic mass.
The included chemical properties like bonding power.
They used atomic mass instead of atomic number.
19
How does the atomic mass of the elements change as you move from top to bottom on the table?
Mass decreases
Stays the same
Mass increases
20
The elements in a column of the periodic table ____.
have similar chemical symbols
have similar properties
are in the same period
have the same atomic mass
21
Which of the following statements about transition metals is true?
They are the most reactive of all types of metals
They are never found uncombined in nature
They are so soft they can be cut with a knife
They include metals such as gold, silver and copper
22
How does the reactivity of elements change as you move from left to right on the table?
Decreases reactivity
Increases Reactivity
Doesn't change
23
Why would it be difficult to determine the properties of a new synthetic element?
The element would combine the properties of the nuclei
The element's nuclei would break apart very quickly
The element would lack properties of ordinary elements
The element would not fit in the periodic table
24
What is an isotope?
an atom with a different number of protons than its neutrons
an atom with a different number of electrons than protons
an atom with different numbers of neutrons and electrons
an atom with a different number of neutrons than its protons
25
Which group of elements share characteristics with both metals and non-metals?
halogens
lanthanides
salts
metalloids
26
Fluorine, chlorine, bromine and iodine are part of a family called _____.
noble gases
alkali metals
halogens
metalloids
27
Which particles in atoms have a negative electric charge?
neutrons
electrons
protons
nucleus
28
Which of the following scientists inferred that an atom's positive charge is in the nucleus?
Niels Bohr
J.J. Thompson
Ernest Rutherford
John Dalton
29
The elements that do not ordinarily form compounds are ______.
metals
noble gases
halogens
elements in the carbon family
30
What is a half-life (in science)?
the amount of time for half a radioactive sample to decay
half of an element
a video game
waves given off by radioactive material
