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WorksheetsIntroductory chemistry
Total questions: 10
Worksheet time: 3mins
What is the first element in the periodic table?
O
H
N
Ar
To what family of elements do the elements helium, neon, and argon belong to?
Halogens
Actinides
Noble gases
Transition metals
What are the name of the atoms of the same element that have a different number of neutrons ?
Allotropes
Radio actives
Organics
Isotopes
Elements such as Na, K and Cu are?
What is the hydrochloric acid formula?
HCl
H2O
HClO3
HClO2
Mendeleev's periodic table organized the elements in order of:
alphabetically
order of discovery
increasing atomic number
increasing atomic weight
The color of the solid sulfur is ?
yellow
red
green
blue
The first synthetic or man-made element was:
uranium
plutonium
radium
technetium
Which of the following scientists was awarded the Nobel Prize in 1911 for the discovery of the radioactive elements such as radium ?
E. Rutherford
John Dalton
Marie Curie
Robert Boyle
Which element is represented by the symbol Cu?
copper
calcium
chromium
chlorine
