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