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WorksheetsAtoms, Elements, Compounds
Total questions: 20
Worksheet time: 20mins
A pure substance made of only one kind of atom and cannot be broken down into simpler substances
Atom
Compound
Element
Molecule
atoms
elements
molecules
compounds
Which describes a pure substance? (Select all that apply.)
Looks the same from every part you look
Looks different from every part you look
Either an element or a compound
Either an element or a mixture
Elements
are made of two or more types of atoms chemically bonded together
are made of one type of atom
are made of two or more types of molecules combined in the same space
are always individual atoms
Which is the smallest particle of an element that has the same properties as that element?
atom
molecule
electron
neutron
A substance that cannot be broken down further chemically is known as...
an element
a compound
a molecule
a mixture
protons, neutrons, and isotopes
neutrons, isotopes, and electrons
positives, negatives, and electrons
protons, neutrons, and electrons
H2O is most accurately described as a ___________________.
molecule
compound
element
atom
The region of negative charge surrounding an atomic nucleus
nucleus
electron cloud
atom
matter
the small, dense region consisting of protons and neutrons at the center of an atom
nucleus
electron cloud
atom
matter
Hydrogen is an example of a(n)-
element
compound
6
12
3
Cannot be determined
Electron
Proton
Neutron
Quark
Neutrons
Protons
Electrons
Protons and electrons
Electrons
Nucleus
Protons
Empty space
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?
10
20
30
Which number here is the atomic number?
5
10.811
