Basic Chemistry Review I

Matter is made from

• energy

• atoms

• stuff

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The number above the element abbreviation is the

• number of neutrons

• number of electrons

• number of protons

• average tomic mass

In the periodic table, the number below each element abbreviation is the

• Number of protons

• Number of neutrons

• Number of atoms

• average atomic mass

The most electronegative elements are in the _________ in the periodic table.

• s block

• p block

• d block

• f block

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Atoms and ions with full shells of electrons are

• very likely to react

• less likely to react

• not at all likely to react

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Most of the elements in the universe are

• non-metals

• metals

• hydrogen

The numbers in front of a reactant or product in a chemical reaction are known as

• coefficients

• subscripts

• integers

How many atoms of O are present in 5MnO₄?

• 1

• 4

• 5

• 20

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The element Cl is

• carbon

• calcium

• cobalt

• chlorine

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The element sodium is abbreviated as

• S

• So

• Sd

• Na