Unit 5_Lesson 5.1 and 5.2

Atoms contain

• nucleus and proton

• nucleus, protons and neutrons

• protons, neutrons and electrons

• nucleus and electrons

_________ and _________ are grouped to form nucleus

• protons, electrons

• protons, neutrons

• neutrons, electrons

• electrons, nuclei

Which of the following statements are correct

• Electrons have a positive charge

• Protons have a positive charge

• Neutron have negative charge

• Neutron have no electrical charge

• Electrons have a negative charge

Who discovered electrons?

• J. J. Thompson

• Rutherford Fort

• James Chadwick

• Charles Darwin

Rutherford Fort discovered ______

• protons

• electrons

• neutrons

• nucleus

Which particles in atom was discovered last?

• neutrons

• protons

• electrons

• neuron

Who discovered neutrons?

• Isaac Newton
• Marie Curie
• James Chadwick
• Albert Einstein

Between Thompson's model of atoms and Rutherford's model of atom, which one has space?

• Thompson's model of atom
• Both of them have space
• Rutherford's model of atom
• Neither of them have space

Two differences between Thompson's model of atom and the modern model are

• Thompson's model doesn't have space while modern model has space

• Thompson's model doesn't have electrons while modern model has electrons

• Both of them don't have neutrons

• Thompson's model doesn't have neutrons while the modern model have neutrons.

Pure element contains .....

• only one type of atom
• a mixture of different atoms
• only one type of molecule
• no atoms at all