A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____________.

In general, nonmetals are __________________.

The millions of compounds that exist are made from approximately _____________elements.

Which of the following cannot be classified as matter?

How many atoms of calcium are in a unit of calcium phosphate whose formula is Ca3(PO4)2

Which of these statements about matter is NOT true?

_______________ has mass and takes up space.

When two pure substances are combined so that each of the pure substances retains its own properties, the result is a (n)

All _______________ except mercury are solids at room temperature.

Most of the mass of an atom is found in its __________________.

When someone stirs cocoa powder into hot water or hot milk, the cocoa changes from a __________________.

In general, metals are ________________.

When Rutherford performed his metal foil experiment, he was surprised that most of the alpha particles _______________.

Vegetable soup is an example of a ____________________.

Matter that has the same composition and properties throughout is called a(n)

Water and hydrogen peroxide have different properties because ______________.

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