structure of atoms

Front

What is the central region of an atom where its neutrons and protons are located?

Back

Nucleus

Front

What is the charge of neutrons in an atom?

Back

Neutrons have no 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.

Front

What does the atomic number indicate about an element?

Back

The atomic number determines the identity of the element and its position in the periodic table.

Front

What is the mass number of an atom?

Back

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

Front

What is the difference between atomic number and mass number?

Back

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

Front

What did James Dalton propose about the structure of atoms?

Back

James Dalton proposed that atoms are indivisible and that each element consists of identical atoms.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding.

Front

What is the significance of the 'plum pudding' model?

Back

The 'plum pudding' model suggested that atoms are composed of a positively charged 'soup' with negatively charged electrons embedded within.

Front

What is an isotope?

Back

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons.