Physics: Atomic Structures

What is an atom?

• A unit of time measurement

• A type of animal

• The basic unit of matter

• A type of fruit

Explain the structure of an atom according to the Bohr model.

• The nucleus of an atom is made up of electrons and the energy levels are located outside the nucleus.

• A small, positively charged nucleus surrounded by negatively charged electrons in specific energy levels or shells.

• A large, negatively charged nucleus surrounded by positively charged electrons in random positions.

• An atom consists of only protons and neutrons with no electrons.

What is the significance of the atomic number of an element?

• It is related to the reactivity of the element

• It represents the number of protons in the nucleus of an atom.

• It indicates the number of electrons in the atom

• It determines the mass of the atom

Describe the concept of isotopes and provide an example.

• Hydrogen-1 and Hydrogen-2 are examples of isotopes of hydrogen.

• Nitrogen-14 and Nitrogen-16 are examples of isotopes of nitrogen.

• Carbon-12 and Carbon-14 are examples of isotopes of carbon.

• Oxygen-16 and Oxygen-18 are examples of isotopes of oxygen.

Valancy of Carbon

• 3

• 4

• 5

• 6