Chemistry Fall Semester Review

Front

How many valence electrons does sulfur have?

Back

Sulfur has 6 valence electrons.

Front

Which element has the smallest atomic radius?

Back

Neon (Ne) has the smallest atomic radius.

Front

What is the name of ZnCl2?

Back

The name of ZnCl2 is zinc (II) chloride.

Front

What is the correct formula for copper(I) cyanide?

Back

The correct formula for copper(I) cyanide is CuCN.

Front

How do you calculate the average atomic mass of an isotope?

Back

Average atomic mass = (mass1 * %abundance1) + (mass2 * %abundance2).

Front

What is the average atomic mass of an element with isotopes of 38.0 amu (67%) and 36.0 amu (33%)?

Back

The average atomic mass is 37.3 amu.

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is the significance of atomic radius in chemistry?

Back

Atomic radius affects the size of atoms and influences chemical reactivity and bonding.

Front

Explain the difference between ionic and covalent bonds.

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is the formula for calculating the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Atomic number.