Atomic Structure and Electromagnetic Radiation

What is the size range of an atom in nanometers?

• 0.1 to 0.5 micrometers

• 1 to 5 nanometers

• 1 to 5 micrometers

• 0.1 to 0.5 nanometers

What is the charge of a neutron?

• -1

• 0

• +1

• Depends on the isotope

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

• Mass number minus atomic number

• Atomic number minus mass number

• Electrons minus protons

• Protons plus electrons

What does the atomic number represent?

• Number of protons

• Number of neutrons

• Total mass of the atom

• Number of electrons in a neutral atom

Who developed the nuclear model of the atom?

• Thomson

• Chadwick

• Bohr

• Rutherford

Which model described the atom as a positive sphere with negative electrons embedded in it?

• Plum pudding model

• Quantum mechanical model

• Nuclear model

• Solid sphere model

What was the key finding of Rutherford's gold foil experiment?

• Atoms are indivisible

• Atoms contain electrons

• Atoms have a solid center

• Atoms are mostly empty space

Which type of radiation is known as a helium nucleus?

• Gamma radiation

• Delta radiation

• Beta radiation

• Alpha radiation

Tags

NGSS.HS-PS1-8

What stops alpha radiation?

• A sheet of paper

• Aluminium foil

• Lead shielding

• Concrete wall

What is the unit for measuring radiation?

• Bequerel

• Rutherford

• Curie

• Newton