15 Questions
Which term refers to the vertical columns in the periodic table?
Groups
What is the atomic number of an element?
The number of protons
Who designed the periodic table and first formulated the Periodic Law?
Dmitri Mendeleev
What is the mass number of an element?
The sum of protons and neutrons
Who discovered the atomic number based on the properties and atomic weight?
John Newlands
Which term refers to the horizontal rows in the periodic table?
Period
What is the atomic mass of an element?
The average of the masses of all the isotopes of an element
Who discovered the Law of Octave?
John Newlands
When was the first periodic table created and how many elements were discovered at that time?
1863, 56 elements
What is the atomic number of an element?
The number of protons in an element
Calculate the molecular weight of CO2.
43.98 g/mole
Calculate the molecular weight for Al(OH)3.
77.95 g/mole
Calculate the molecular weight for NaCl.
58.44 g/mole
A chemist has a jar containing 388.2 g of iron filings. How many moles of iron does the jar contain?
6.95 mole
A chemist needs 22g of phenol (C6H5OH) for an experiment. How many moles of phenol is this?
2.47 mole
Test your knowledge on the Periodic Table with this quiz! Explore the arrangement of elements by atomic number, period, and group. Discover the similarities and differences in chemical and physical properties.
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