Ions and Counting Atoms Quiz

What is a cation?

• A chemical compound without ions

• An ion with a negative charge

• An ion with a positive charge

• An atom without an electric charge

What is an anion?

• An ion with a negative charge

• A chemical compound

• An atom without charge

• An ion with a positive charge

What is the relationship between valence electrons and the formation of ions?

• The formation of ions depends on the number of protons in the nucleus, not on the valence electrons.

• Valence electrons have no relationship with the formation of ions.

• Valence electrons only affect the electrical conductivity of an atom, not the formation of ions.

• Valence electrons determine an atom's ability to form ions.

What is a coefficient in a chemical formula?

• Weight of the atoms in the formula

• Color of the elements in the formula

• Temperature at which the elements in the formula react

• Number that indicates the amount of molecules or atoms of each element present in the formula

What is a subscript in a chemical formula?

• Indicates the number of atoms of an element in a molecule

• It is a positive integer

• Indicates the atomic weight of an element

• Represents the electric charge of an atom

How are atoms counted in a chemical formula?

• Counting the letters of the formula

• Using Roman numerals

• Using numeric subscripts

• It is not possible to count the atoms in a chemical formula

What is the difference between a metal and a non-metal in terms of ion formation?

• Metals and non-metals form ions with the same charge.

• Metals form positive ions and non-metals form negative ions.

• Metals form negative ions and non-metals form positive ions.

• Metals do not form ions, only non-metals do.

How many valence electrons does a sodium atom have?

• 3

• 1

• 2

• 0

What is the coefficient in the chemical formula 2H2O?

• 1

• 4

• 2

• 3

What is the subscript in the chemical formula H2O?

• 1

• 2

• 3

• 4