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WorksheetsAtoms, Elements, Compounds, and Molecules
Total questions: 23
Worksheet time: 12mins
A _________ is formed when two or more atoms of any type combine.
Atom
Element
Molecule
Compound
These are all examples of ____________.
Atoms
Elements
Molecules
Compounds
The best definition of a molecule is...
The building block of the universe
2 or more of the same type of atom bound together
2 or more of any type of atom bound together
2 or more different types of atoms bound together
Table salt (NaCl) is a good example of a(n) __________ because it contains atoms of different types.
Atom
Element
Molecule
Compound
Compounds are certain types of molecules that contain _________.
Only one type of atom
A certain proportion of "Atom A" to "Atom B"
Too many electrons
More than one type of atom
Ozone (O3) is an example of a ___________ but not a __________ because it's made up of ALL oxygen atoms
Molecule, compound
Compound, molecule
All compounds are molecules, but not all molecules are compounds.
True
False
This is an image of glucose (a sugar that is a very important source of fuel for your body). Check the TWO boxes that would describe what Glucose is.
Atom
Element
Compound
Molecule
When atoms are joined together, they form .
molecules
nuclei
electrons
protons
Sodium is a reactive, alkali metal. A neutral sodium atom consists of 11 protons, 11 electrons and 12 neutrons. It is a soft metal and metallic silver in color. Sodium plays an important role in the functioning of the human nervous system. Which of the following images represents the atomic structure of a neutral sodium atom?
W
X
Y
Z
What makes an atom of one element different from the atom of another element?
different numbers of protons in the nucleus
different charges on the neutrons in the nucleus
different numbers of electrons surrounding the nucleus
different numbers of neutrons in the nucleus
What part of an atom exists in orbitals surrounding the nucleus?
photon
neutron
electron
proton
The smallest part of a compound that still has the physical and chemical properties of the compound is a(n)
mixture
nucleus
orbital
molecule
Which of the following best describes what the 118 known chemical elements combine to form?
all the cells of living organisms only
all of the energy on Earth
all of the heat and light from the Sun
all the matter in the Universe
A model of a carbon dioxide molecule is shown. Which of the following best describes the carbon dioxide molecule?
It contains three compounds from two elements.
It contains two elements from three compounds.
It contains three atoms from two elements.
It contains two atoms from three elements.
Electrons are attracted to nuclei because electrons and ______________ have ______________ electric charges.
protons, opposite
protons, similar
neutrons, similar
neutrons, opposite
The atomic number of an element is determined by its number of _______.
neutrons
electrons
isotopes
protons
The image shows a container of plant fertilizer. Which of the following is a compound that is found in the fertilizer?
zinc (Zn)
ammonia (NH3)
copper (Cu)
iron (Fe)
Sodium has an atomic number of 11 and an average atomic mass of 22.99 amu. Which of the following shows the correct Bohr model diagram for the element sodium (Na)?
W
X
Y
Z
Diamond and graphite contain only carbon atoms, yet they are very different objects with very different properties. Why are diamond and graphite different?
They contain different elements.
Their atoms are arranged differently.
They contain different atoms.
Their subatomic particles are different.
Where in an atom are neutrons located?
in the photons
in areas of probability
in the nucleus
in orbitals
Which particles in an atom have opposite charges and are attracted to each other?
a proton and an electron
two protons together
a neutron and an electron
a proton and a neutron
Each square of the periodic table shows information about one element. The square usually shows the element's _______.
atomic mass
symbol
atomic number
all of these
