Chapter 6

Which of the following elements is in the same period as phosphorus?

• carbon

• magnesium

• nitrogen

• oxygen

Each period in the periodic table corresponds to ____.

• a principal energy level

• an energy sublevel

• an orbital

• a suborbital

The modern periodic table is arranged in order of increasing atomic ____.

• mass

• charge

• number

• radius

Which of the following categories includes the majority of the elements?

• metalloids

• liquids

• metals

• nonmetals

Of the elements Pt, V, Li, and Kr, which is a nonmetal?

• Pt

• V

• Li

• Kr

To what category of elements does an element belong if it is a poor conductor of electricity?

• transition elements

• metalloids

• nonmetals

• metals

In which of the following sets is the symbol of the element, the number of protons, and the number of electrons

given correctly?

• In, 49 protons, 49 electrons

• Zn, 30 protons, 60 electrons

• Cs, 55 protons, 132.9 electrons

• F, 19 protons, 19 electrons

The atomic number of an element is the total number of which particles in the nucleus?

• neutrons

• protons

• electrons

• protons and electrons

What element has the electron configuration 1s

2

2s

2

2p

6

3s

2

3p

2

?

• nitrogen

• selenium

• silicon

• silver

Which of the following is true about the electron configurations of the noble gases?

• The highest occupied s and p sublevels are completely filled.

• The highest occupied s and p sublevels are partially filled.

• The electrons with the highest energy are in a d sublevel.

• The electrons with the highest energy are in an f sublevel.