CFE Review Quiz 2

Which of the following elements has the smallest atomic radius?

• Zinc (Zn)

• Arsenic (As)

• Bromine (Br)

• Calcium (Ca)

Potassium metal (K) reacts violently when mixed with water and produces potassium hydroxide gas. Which metal would most likely react similarly?

• titanium (Ti)

• sodium (Na)

• aluminum (Al)

• magnesium (Mg)

What is the BEST explanation for why the electronegativity decreases going down a group 1 from hydrogen to francium?

• The atomic radius decreases.

• The number of neutrons increases.

• The number of valence electrons increases.

• The valence electrons are farther away from the nucleus.

Which of the following choices correctly ranks the atomic radius in order from smallest to largest?

• He, Mg, K

• Mg, K, He

• K, Mg, He

• K, He, Mg

Which of the following list of elements contains only metalloids?

• Na, Fe, Sn

• F, Xe, H

• Si, Br, Cu

• Si, As, Sb

The atom with the largest atomic radius in Group 18 is - 

• Ar

• He

• Kr

• Rn

How many protons, neutrons and electrons are in a neutral atom of the isotope zinc-65?

• 30 protons, 30 neutrons, 65 electrons

• 30 protons, 65 neutrons, 30 electrons

• 65 protons, 30 neutrons, 65 electrons

• 30 protons, 35 neutrons, 30 electrons

What is the difference between the following two isotopes?

• The number of protons.

• The number of neutrons.

• The number of electrons.

• The number of valence electrons.

Based on the following electronegativity values, which bond would be the most polar?

• P - P

• Cl - O

• Mg - O

• Mg - Mg

How many neutrons are in an isotope of a nitrogen-15 atom?

• 7

• 8

• 14

• 15