Periodic Table
Quiz
•
Science
•
7th - 9th Grade
•
Hard
Rebecca Kloepfer
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
About how many known elements are in the periodic table?
10
50
100
200
Answer explanation
There are about 118 known elements in the periodic table. As scientists continue to experiment with particle accelerators and cyclotrons, they will be able to make more elements. Many of the manmade elements in the table only exist for a few milliseconds before they break apart.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Elements in the periodic table are arranged by...
Atomic mass
Atomic number
Number of neutrons
Chemical reactivity
Answer explanation
The elements in the periodic table are organized by atomic number. Hydrogen (H) and helium (He) make up the top row of the periodic table at numbers one and two, respectively. The atomic number represents the number of protons and electrons in a neutral atom. You may also hear the term ‘proton number’ used instead of ‘atomic number’.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these things are NOT listed in the periodic table?
Element name or symbol
Atomic mass
Atomic orbital radius
Atomic number
Answer explanation
You will not find information about the atomic radius of an atom in the periodic table. The square for each element will have the atomic number, atomic weight, name, and symbol for each element.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which scientist came up with the concept of a periodic table?
Jason Priestly
Henry Moseley
Antoine Lavoisier
Dmitri Mendeleev
Answer explanation
Dmitri Mendeleev gets the credit for designing the modern periodic table. Jason Priestly is an actor. Joseph Priestly and Antoine Lavoisier were both chemists. Albert Einstein developed theories about atomic particles.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The rows of the periodic table are called periods.
True
False
Answer explanation
The rows of the periodic table are called periods. The columns of the periodic table are called groups. Periods are loosely organized by the number of atomic orbitals found in each element. For example, hydrogen (H) in the first row has only one orbital. Lithium (Li) in the second row has electrons in two orbitals. Francium (Fr), in row seven, has electrons in seven orbitals.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these is NOT a family of elements?
Halogens
Alkali Metals
Transition Metals
All of these are families
Answer explanation
All of these choices are different types and families of elements. Inert gases can be found on the far right of the periodic table in group VIIIA. Halogens are just to the left in VIIA. Metals make up the center and left side of the table in a variety of groups.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The atomic number of an element tells you the number of _____ in an atom.
Protons
Neutrons
Electrons
None of the above
Answer explanation
The atomic number of an element tells you the number of electrons and protons in a neutral atom. Ions are atoms of an element with different numbers of electrons. Isotopes are forms of an element with different numbers of neutrons.
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