LE1-CFE-Lec-Prelim

The first ionization energies of the elements __________ as you go from left to right across a period of the periodic table, and __________ as you go from the bottom to the top of a group in the table.

• increase, increase

• increase, decrease

• decrease, increase

• decrease, decrease

• are completely unpredictable

Atomic radius generally increases as we move _____.

• down a group and from right to left across a period

• up a group and from left to right across a period

• down a group and from left to right across a period

• up a group and from right to left across a period

• down a group; the period position has no effect

Elements in the modern version of the periodic table are arranged in order of increasing __________.

• oxidation number

• atomic mass

• average atomic mass

• atomic number

• number of isotopes

Most of the elements on the periodic table are ____.

• Gases

• Non-metals

• Metalloids

• Liquids

• Metal

Which of the following atoms has the largest atomic radius?

• Na

• K

• Mg

• Ca

• Both A and C

Which properties are most common in nonmetals?

• low ionization energy and low electronegativity

• low ionization energy and high electronegativity

• high ionization energy and low electronegativity

• high ionization energy and high electronegativity

Which Group 17 element has the least attraction for electrons?

• F

• Cl

• Br

• I

• Both B and C

Which of the following best describes the variation of electronegativity with respect to an element's position on the periodic table?

• Increases across a period; increases down a group.

• Increases across a period; decreases down a group.

• Decreases across a period; increases down a group.

• Decreases across a period; decreases down a group.

Which of the following groups of elements is arranged correctly in order of increasing electronegativity?

• B < O < Al < F

• Al < B < O < F

• B < O < F < Al

• F < O < B < Al

Which of the following elements is a noble gas?

• Krypton

• Chlorine

• Antimony

• Manganese

• Iron