BSc-Sem-I (quiz-1)

Is the atom the smallest unit of matter/molecule?

• Yes

• No

• Atoms does not exist in mattehr

• None of these

What is the smallest uinit of a matter?

• atom

• molecules

• electron

• None of these

what is charge on electron

• negative

• positive

• neutral

• none of these

What are three fundamental particle of an atom

• Protons, Neutrons, Electrons
• Protons and Electrons,

• Neutrons

• Protons, Neutrons, Positrons

Is the most of the space inside the atom is vacant

• Yes, most of the space inside the atom is vacant
• No, most of the space inside the atom is filled with electrons
• No, most of the space inside the atom is filled with protons
• No, most of the space inside the atom is filled with neutrons

where are the electron, proton and neutron is present?

• Protons and neutrons are located at the center of an atom, known as the nucleus, while electrons are found outside the nucleus.

• All three particle is found inside the nucleus.

• these partiles do not exist.

• none of these.

what is basic assumption of Borh's model?

• Electrons move in circular orbits around the nucleus
• Electrons are stationary
• Electrons move in elliptical orbits around the nucleus
• Electrons move randomly in the atom

Heisenberg's Uncertainty Principle states that it is impossible to simultaneously know the exact values of which two properties of a particle?

• Mass and charge

• Position and momentum

• Energy and angular momentum

• None of these

What is an electron?

• A Particle

• A Wave

• Dual nature ( Particle and Wave)

• None of the these.

Does a proton also have a wave nature?

• No, because it is find inside the nucleous

• Yes, because it is small