Chemistry Final Test Review Horton

Front

What are valence electrons?

Back

Valence electrons are subatomic particles found in the outermost shell of an atom and are responsible for the atom's reactivity.

Front

What are the vertical columns in the Periodic Table called?

Back

The vertical columns in the Periodic Table are called groups.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.

Front

How do you balance the equation NH3 → N2 + H2? What is the coefficient for H2?

Back

When balanced, the coefficient for H2 is 3.

Front

What is the atomic mass of Arsenic (As)?

Back

The atomic mass of Arsenic is 75.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms, influencing the formation of molecules.

Front

What is the difference between groups and periods in the Periodic Table?

Back

Groups are vertical columns that share similar chemical properties, while periods are horizontal rows that indicate the number of electron shells.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the atomic mass and stability of the nucleus but do not affect the chemical properties of the atom.

Front

How do you determine the number of protons in an atom?

Back

The number of protons in an atom is equal to its atomic number.

Front

What is the formula for calculating the atomic mass of an element?

Back

The atomic mass is calculated as the weighted average of the masses of an element's isotopes.