WorksheetsPeriodic Table Table, Atoms and Elements
Total questions: 20
Worksheet time: 10mins
How many atoms of oxygen are in a molecule of glucose, C6H12O6?
3
12
10
6
How many atoms are in one formula unit of the compound FeC5O5?
1
5
10
11
How many atoms of carbon are included in one formula unit of the compound Na2C2O4?
1
2
3
4
In the reaction shown, iron reacts with water to form iron oxide (Fe3O4) and hydrogen gas (H2).
Which of these BEST describes the iron (Fe) reactant?
element
molecule
compound
ion
The compound potassium sulfate, K2SO4, is composed of
2 atoms of potassium, 1 atom of sulfur, and 4 atoms of oxygen.
2 atoms of potassium, 4 atoms of sulfur, and 4 atoms of oxygen.
two molecules of potassium and one molecule of sulfate.
one molecule of potassium and two molecules of sulfate.
Where are the most reactive metals located on the periodic table?
the uppermost complete row of the table
the rows at the bottom of the table connecting two section
the column at the far left side of the table
the second column from the right side of the table
Which of these gaseous elements is LEAST reactive?
hydrogen
helium
nitrogen
oxygen
Elements in the same column of the periodic table of the elements all
have the same number of protons.
share the same atomic structure.
have similar physical characteristics.
share the same number of neutrons.
Sodium, Na, is in the same group as
Ne
Mg
Ca
K
According to the periodic table, argon is found in what column?
1 (1A)
2 (2A)
16 (6A)
18 (8A)
What is the smallest unit of an element that still retains the element’s properties?
proton
crystal
atom
molecule
Which statement BEST describes an atom with an atomic number of 20?
The atom has 20 protons.
The atom has 20 neutrons.
The sum of the number of protons and electrons is 20.
The sum of the number of protons and neutrons is 20.
Elements are identified by their atomic number because
the mass of an element changes over time.
the number of protons remains constant.
atoms of the same element have different numbers of neutrons.
elements in a group react in a similar way.
In which pair of elements are both metalloids?
Sn and Sb
Sb and Te
Te and I
I and Xe
Which part of an atom is involved in chemical reactions?
nucleus and its particles
negatively-charged particles
neutrally-charged particles
positively-charged particles
The model represents a fluorine (F) atom. What is the mass of the atom?
9
10
19
20
What identifies a part of an atom.
proton, neutron, and electron
molecule, compounds, and elements
nucleus, DNA, and RNA
proton, element, and nucleus
An atom consists of a nucleus surrounded by
ions
protons
neurons
electrons
Which of these atomic structures has the least amount of mass?
an ion
proton
neutron
electron
Which particles make up MOST of the mass of an atom?
protons and neutrons
protons and electrons
rotons and electrons
electrons and molecules
