Chemistry Regents June

Charge of an electron

• negative charge

• positive charge

• neutral

Location of an electron

• outside the nucleus

• inside the nucleus

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Why is an atom neutral?

• same number of protons and electron

• fewer neutrons than electrons

• more protons than electrons

Isotopes

• same number of protons and a different number of neutrons

• same number of protons and a different number of electrons

Which electrons in a calcium atom have the greatest effect on the chemical properties of calcium?

• the 2 electrons in the fourth shell

• the 2 electrons in the first shell

• the 8 electrons in the second shell

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The weighted average of the atomic masses of the naturally occurring isotopes of an element is the

• atomic mass

• atomic number

• mass number

• formula mass

Identify the metalloid

• Cr

• Ar

• Ge

• Fe

Identify a CHEMICAL property of iron

• Iron oxidizes

• Iron is solid at STP

• Iron melts

• Iron is attracted to a magnet

Graphite and diamond are two forms of the same element that DIFFER in their

• atomic numbers

• crystal structures

• electronegativities

• empirical formulas

Which has a larger radius?

• Br^-

• I^-

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