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WorksheetsElements and Periodic Table
Total questions: 15
Worksheet time: 15mins
What is NOT made up of two or more elements that are chemically combined?
Element
Compound
Mixture
Solid
Liquid
An atom of the element zinc has an atomic number of 30 and a mass number of 65. How many protons does an uncharged zinc atom have?
30
35
65
95
Who is known as the "father of modern chemistry” because he first organized all known elements into four different groups?
Johann Wolfgang Döbereiner
Antoine Lavoisier
Dmitri Mendeleev
Henry Moseley
The elements in group 17 of the periodic table are all called halogens. All halogens have the same
atomic number
atomic mass
number of possible isotopes
number of valence electrons
While looking at xenon (Xe) on the periodic table, a student needs to find an element with a smaller atomic mass in the same group. Where should the student look?
directly up
directly down
directly to the left
directly to the right
The arrow is pointing to sodium's
number of neutrons.
number of valence electrons.
combined number of neutrons and protons.
combined number of electrons and protons
All atoms of the same element must have the same number of
protons
neutrons
compounds
electrons
entists in a lab are working with two different samples of the element mercury. They know that the different samples are different isotopes.
Which property of the isotopes must be different?
the atomic number
the electric charge
the element name
the mass number
When an atom that has no charge loses two electrons, it becomes a
positive ion.
negative ion.
positive isotope.
negative isotope.
What is the number of protons that the element in this image contain?
14
7
15
18
Beryllium has how many protons?
4
9.0122
2
13.0122
Which of the following elements is a noble gas?
Helium
Oxygen
Nitrogen
Carbon
What is the atomic number of Carbon?
6
12
14
16
Which element is represented by the symbol Fe on the periodic table?
Iron
Fluorine
Francium
Fermium
