Intro to Physics G12

What is the charge of an electron?

• positive

• negative

• neutral

Which of the following particles has the smallest mass?

• alpha

• neutron

• proton

• electron

Which one is more accurate to represent the orbit of electrons in an atom?

• 
• 

From the notation as shown in the figure, we can conclude that....

• the number of protons in a hydrogen atom is two

• the number of protons in a helium atom is two

• the number of protons and electrons in a hydrogen atom is two

• the number of protons and electrons in a helium atom is two

Which statement is correct?

• protons and electrons carry positive charge

• protons and electrons carry negative charge

• protons carry positive charge and electrons carry negative charge

• protons carry negative charge and electrons carry positive charge

What determines which element an atom is?

• The number of protons

• The number of electrons

• The number of neutrons

• The mass number

A star generates energy by a reaction of two or more atomic nuclei to form a heavier nucleus. This reaction is called...

• Photosynthesis

• Fision

• Fusion

• Endothermic

Which carbon isotope is more stable?

• 
• 
• 

Which of the following electromagnetic spectrum has the shortest wavelength?

• X-ray

• visible

• infrared

• radio

Which of the following electromagnetic spectrum has the lowest energy?

• X-ray

• visible

• infrared

• radio