1st Sem Final Test Nuclear Chemistry and Atomic Structure

Front

What is the mass number of an element?

Back

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

Front

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

Back

Number of neutrons = Mass number - Atomic number.

Front

Where are electrons located in an atom?

Back

Electrons are found in the electron cloud surrounding the nucleus.

Front

What are the negatively charged particles in an atom?

Back

Electrons are the negatively charged particles of an atom.

Front

What is the electron cloud model?

Back

The electron cloud model describes the regions around the nucleus where electrons are likely to be found, mostly consisting of empty space.

Front

What is an atomic number?

Back

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

Front

What is the difference between protons and neutrons?

Back

Protons are positively charged particles, while neutrons have no charge.

Front

What is the role of electrons in chemical bonding?

Back

Electrons in the outermost shell (valence electrons) are involved in forming chemical bonds between atoms.

Front

What is a stable atom?

Back

A stable atom has a balanced number of protons and neutrons, resulting in a non-radioactive state.

Front

What is radioactivity?

Back

Radioactivity is the process by which unstable atomic nuclei lose energy by emitting radiation.