Scientists have identified about 100 different kinds of _____.
The atomic weight of an atom is mostly the mass of its __________.
Compare a proton to a neutron
______ is matter made of one kind of atom.
The periodic table is organized by the properties of ______.
A molecule is:
The unaided human eye can view objects as small as 50 micrometers in diameter. Based on this information, what can be concluded about the size of molecules?
Why is it impossible to see molecules with the naked eye?
H2, O2, and N2 are all examples of ________.
What are compounds? Compounds are ________.
The shapes of _____________ are determined by the regularly repeating arrangement of its atoms.
Pure sodium can cause burns. Pure chlorine can cause burns. When they combine into a molecule (NaCl) the new substance is _______________.
At room temperature, oxygen is a gas and hydrogen is a gas. When they combine at room temperature, they form a _______________.
Polymers are chains of molecules that ________________.
Which of the following would be made of a polymer with a low degree of elasticity?
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