Which of the following is true of an atom?

• The negative electrons are in motion around the positive nucleus to which they are attracted.

• The negative neutrons are in motion around the neutral nucleus to which they are attracted.

• The neutral electrons are in motion around the positive protons to which they are attracted.

• The positive protons are in motion around the negative neutrons to which they are attracted.

Which of the following statements is true with regard to isotopes?

• Isotopes of an element have the same number of protons but a different number of electrons.

• Isotopes of an element have the same number of electrons but a different number of protons.

• Isotopes of an element have the same number of protons but a different number of neutrons.

• Isotopes of an element have the same number of neutrons but a different number of protons.

Which of the following refers to a negatively charged particle that lies outside of the nucleus of an atom?

• A. neutron

• B. electron

• C. isotope

• D. proton

The nucleus of an atom is surrounded by

• A. a neutron cloud.

• B. an electron cloud.

• C. rings of orbiting protons.

• D. rings of orbiting neutrons.

Which element is a noble gas?

• A. manganese

• B. chlorine

• C. antimony

• D. krypton

Which of the following elements has the strongest attraction for electrons?

• A. oxygen

• B. aluminum

• C. boron

• D. sulfur

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An atom can become less reactive by

• . gaining or losing electrons from its outermost shell.

• gaining protons from its outermost shell.

• losing neutrons from its innermost shell.

• losing electrons from its nucleus.

What are the horizontal row of blocks in the periodic table?

• A. group

• B. period

• C. family

• D. octet

In which section of the Periodic Table are the most active metals located?

• A. lower right corner

• B. upper right corner

• C. lower left corner

• D. upper left corner

Which of the following groups of elements do not have a charge and why?

• Alkali Metals, because they have one valence electron.

• Noble Gases, because they have a full outer shell of electrons.

• Halogens, because they have seven valence electrons.

• Alkaline Earth Metals, because they have two valence electrons.