Isotope Notation

Front

What is isotope notation?

Back

Isotope notation is a way to represent isotopes of an element, typically written as 'Element Symbol - Mass Number'. The mass number is the total number of protons and neutrons in the nucleus.

Front

What does the mass number represent in isotope notation?

Back

The mass number represents the total number of protons and neutrons in an atom's nucleus.

Front

How do you determine the number of neutrons in an isotope?

Back

To find the number of neutrons, subtract the atomic number (number of protons) from the mass number.

Front

What is the atomic number of an element?

Back

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

Front

If an atom has 14 neutrons and its mass number is 27, what is the atomic number?

Back

The atomic number is 13, calculated as 27 (mass number) - 14 (neutrons).

Front

What does a positive charge on an atom indicate about its electrons?

Back

A positive charge indicates that the atom has lost electrons. The number of electrons is equal to the atomic number minus the charge.

Front

If an atom of oxygen has a charge of -2, how many electrons does it have?

Back

It has 10 electrons, calculated as 8 (atomic number) + 2 (negative charge).

Front

What is the significance of protons in an atom?

Back

Protons determine the element's identity and its position on the periodic table.

Front

How many protons does the element with the symbol 'Mo' have?

Back

Molybdenum (Mo) has 42 protons.

Front

What is the relationship between isotopes and neutrons?

Back

Isotopes of an element have the same number of protons but different numbers of neutrons.