Elements And Compounds Question Preview (ID: 36042)


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Only ______________ are found on the periodic table.
a) mixtures
b) elements
c) compounds
d) formulas

The most common elements in the atmosphere are
a) hydrogen and helium
b) nitrogen and oxygen
c) hydrogen and oxygen
d) silicon and oxygen

What are the most common elements in the Earth's crust?
a) hydrogen and helium
b) aluminum, silicon, oxygen
c) nitrogen and oxygen
d) hydrogen and oxygen

A combination of chemical symbols used to represent a compound
a) chemical equation
b) chemical reaction
c) chemical sentence
d) chemical formula

Atom is to element as molecule is to
a) product
b) subscript
c) coefficient
d) compound

Smallest part of a compound is a
a) quark
b) atom
c) molecule
d) proton

What holds compounds together?
a) physical bonds
b) chemical bonds
c) duct tape
d) rope

Pure substance made up of two or more kinds of elements that have been chemically joined.
a) compound
b) element
c) mixture
d) reaction

Pure substance made of one kind of atom and CANNOT be broken down is
a) mixture
b) compound
c) element
d) atom

What are the most common elements in the oceans?
a) oxygen and carbon
b) hydrogen and oxygen
c) nitrogen and oxygen
d) aluminum and silicon

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