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WorksheetsGeneral Chemistry Review
Total questions: 15
Worksheet time: 15mins
Which statement explains why helium is included with the other Group 18 elements?
Helium is a gas at STP.
Helium has a low melting point.
Helium atoms have a stable valence electron configuration.
Helium atoms have eight valence electrons.
Which list represents the classification of the elements nitrogen, neon, magnesium, and silicon, respectively?
Metal, metalloid, nonmetal, noble gas
Nonmetal, noble gas, metal, metalloid
Nonmetal, metalloid, noble gas, metal
Noble gas, metal, metalloid, nonmetal
What property do the halogens have in common?
a. They have a filled valence shell.
b. They only have one valence electron.
c. They have room for one more electron in their valence shell.
d. They readily lose one electron to form ions with a 1+ charge.
What is true as you move from left to right across a period on the periodic table?
Oxidation numbers become more positive.
Metallic character decreases.
Atomic size increases.
Electronegativity decreases.
Which of the following elements has the greatest ionization energy?
Oxygen
Sodium
Chlorine
Neon
Using the elements from the previous question (O, Na, Cl, Ne), which of the following best explains why this element has the greatest ionization energy?
The attraction between the nucleus and the valence electrons is strongest.
The attraction between the nucleus and the valence electrons is weakest.
Atoms of this element have a greater number of valence electrons.
Atoms of this element have fewer valence electrons.
Which of the following elements is most likely to form a cation?
Oxygen
Iron
Carbon
Helium
Using the elements (O, Fe, C, He), which of the following best explains why this element is most likely to be a cation?
It has the lowest ionization energy.
It has the strongest nucleus.
It has the smallest atomic radius.
It is the most electronegative.
Why does atomic radius increase as you move from top to bottom of a group?
Effective nuclear charge decreases.
Effective nuclear charge increases.
The number of occupied electron shells decreases.
The number of occupied electron shells increases.
Why do covalent compounds have low melting points compared to ionic compounds?
They have stronger chemical bonds between the atoms.
They have weaker chemical bonds between the atoms.
They are held together by weaker intermolecular forces instead of strong intramolecular bonds.
They are held together by stronger intermolecular forces instead of weak intramolecular bonds.
What is a difference between ionic and covalent bonds?
Ionic bonds are formed by sharing electrons while covalent bonds are formed by transferring electrons.
Ionic bonds are formed by transferring electrons while covalent bonds are formed by sharing electrons.
Ionic bonds are formed from two metals while covalent bonds are formed between two nonmetals.
Ionic bonds are formed from two nonmetals while covalent bonds are formed between two metals.
An ionic compound has the chemical formula X₂O. Which of the following could be element X?
Fluorine
Magnesium
Aluminum
Potassium
Which of the following best explains why the atomic radius decreases across a period in the periodic table?
A) Increased nuclear charge pulls electrons closer to the nucleus.
B) Decreased nuclear charge allows electrons to spread out.
C) Electrons are added to higher energy levels.
D) Electrons are lost from the outer shell.
What is the primary reason for the high melting point of ionic compounds?
A) Strong electrostatic forces between ions.
B) Weak van der Waals forces between molecules.
C) Strong covalent bonds within molecules.
D) Weak hydrogen bonds between ions.
Which of the following elements is most likely to form an anion?
A) Sodium
B) Chlorine
C) Magnesium
D) Helium
