Semester I Exam Review - Chemistry

All atoms are ____.

• positively charged, with the number of protons exceeding the number of electrons

• negatively charged, with the number of electrons exceeding the number of protons

• neutral, with the number of protons equaling the number of electrons

• neutral, with the number of protons equaling the number of electrons, which is equal to the number of neutrons

The element X has 2 valence electrons. It is a

• metal

• non-metal

• metalloid

• gas

Which group of elements would be expected to have very similar properties?

• Oxygen, sulfur, selenium.

• Nitrogen, oxygen, fluorine.

• Sodium, magnesium, potassium.

• Neon, sodium, potassium.

Identify the two subatomic particles that are referred to as “nucleons” because they are located in the nucleus of an atom?

• Protons and Electrons

• Protons and Neutrons

• Neutrons and Electrons

• Ions and Isotopes

What subatomic particle has a negative charge?

• Protons

• Electrons

• Neutrons

• Protons and Electrons

What subatomic particle has a positive charge?

• Protons

• Electrons

• Neutrons

• Protons and Electrons

As the number of principle energy levels (electron shells) decrease going up a group, the atomic radius of the elements in that group

• Increases

• Decreases

• Remains the same

• Cannot be determined

Which of the following atoms has the largest atomic radius?

• Na

• Mg

• Ca

• K

Which noble gas has the lowest ionization energy?

• He

• Ne

• Rn

• Kr

The ability of carbon to attract electrons is

• Greater than nitrogen, but less than oxygen

• Less than nitrogen, but greater than oxygen

• Greater than nitrogen and oxygen

• Less than nitrogen and oxygen