Determining Protons Electrons Neutrons

Front

What does the atomic mass of an element represent?

Back

The atomic mass represents the average mass of an atom of an element, measured in atomic mass units (amu). It accounts for the number of protons and neutrons in the nucleus.

Front

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

Back

The number of protons in an atom is equal to the atomic number of the element, which is usually found on the periodic table.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons is equal to the number of electrons, resulting in no overall charge.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom and determines the element's identity.

Front

How do you find the number of neutrons in an atom?

Back

To find the number of neutrons, subtract the atomic number from the atomic mass (rounded to the nearest whole number).

Front

What is the atomic mass of Sodium?

Back

22.990

Front

What is the atomic mass of Neon?

Back

20.18

Front

How many electrons does an atom of Krypton have?

Back

36

Front

How many electrons are in a gold atom?

Back

79

Front

What is the significance of the bottom number in an element's box on the periodic table?

Back

The bottom number typically represents the atomic mass of the element.