Flashcard on Atomic Structure

Front

What is Dalton's atomic theory?

Back

Dalton's atomic theory states that all matter is made up of atoms, which are indivisible and indestructible particles. Atoms of the same element are identical, and compounds form when atoms of different elements combine in specific ratios.

Front

What was missing from Dalton’s atomic theory?

Back

Atoms of different elements have different masses.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the nucleus of an atom?

Back

The nucleus is the dense, positively charged core of an atom, containing protons and neutrons.

Front

What are electrons?

Back

Electrons are negatively charged particles that move around the nucleus of an atom.

Front

What is the cloud model of the atom?

Back

The cloud model describes electrons as existing in a cloud around the nucleus, rather than in fixed orbits.

Front

What is the modern model of the atom?

Back

The modern model includes protons, neutrons, and electrons, with electrons moving in specific orbits around the nucleus.

Front

What is the difference between protons and neutrons?

Back

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