Unit 4 Atomic Structure and Radioactivity(Chem) 2024

Front

What is carbon dating?

Back

A method used to determine the age of an object containing organic material by measuring the amount of carbon-14 it contains.

Front

What does it mean for an isotope to have the same atomic number?

Back

It means that isotopes of the same element have the same number of protons in their nuclei.

Front

What is the average atomic weight of Neon?

Back

20.18

Front

How do oxygen-16 and oxygen-18 differ?

Back

Oxygen-18 has two more neutrons than oxygen-16.

Front

What happens to the number of protons when a sodium atom forms an Na+ ion?

Back

The number of protons stays the same.

Front

What is an isotope?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of the atomic number?

Back

The atomic number determines the identity of an element and is equal to the number of protons in the nucleus.

Front

What is radioactive decay?

Back

The process by which an unstable atomic nucleus loses energy by emitting radiation.

Front

What is the difference between mass number and atomic weight?

Back

Mass number is the total number of protons and neutrons in an atom, while atomic weight is the weighted average of the masses of an element's isotopes.

Front

What is a neutron?

Back

A subatomic particle found in the nucleus of an atom that has no electric charge.