U3.1 Atom Structure Practice

Front

What is the mass number of an atom?

Back

The mass number of an atom is the total number of protons and neutrons in its nucleus.

Front

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

Back

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

Front

What is the charge of an atom with an unequal number of protons and electrons?

Back

An atom with an unequal number of protons and electrons has a net charge, making it an ion.

Front

What are the three main subatomic particles in an atom?

Back

The three main subatomic particles are protons, neutrons, and electrons.

Front

Where are protons located in an atom?

Back

Protons are located in the nucleus of an atom.

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 determines the element's identity.

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle that orbits the nucleus of an atom.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number determines the position of an element in the periodic table and its chemical properties.

Front

What is the relationship between mass number and atomic number?

Back

The mass number is the sum of protons and neutrons, while the atomic number is the number of protons.

Front

What defines an atom as a neutral particle?

Back

An atom is considered neutral when it has an equal number of protons and electrons.