Structure of an Atom

What is an atom made up of?

• Protons and neutrons
• Protons and electrons
• Neutrons and electrons
• Protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

What is the atomic number of an element?

• The number of neutrons it has
• The number of electrons it has
• The number of protons it has
• The number of energy levels it has

Where are protons and neutrons located in an atom?

• In the atomic orbitals
• In the electron energy levels
• In the electron cloud
• In the center or nucleus

Tags

NGSS.MS-PS1-1

How many electrons can the first energy level of an atom fit?

• Six
• Four
• Eight
• Two

What is the charge of a proton?

• It varies
• Negative
• Positive
• Neutral

What is the mass contribution of a neutron?

• It varies
• 2amu
• 0amu
• 1amu

Do electrons contribute to the mass of an atom?

• No
• It depends on the element
• Yes
• It depends on the number of electrons

What is the default charge of an element on the periodic table?

• Neutral
• Negative
• It varies
• Positive

How is mass computed?

• By subtracting the number of protons from the number of electrons
• By adding the number of protons and the number of neutrons
• By adding the number of protons and the number of electrons
• By adding the number of neutrons and the number of electrons

How is charge computed?

• By adding the number of protons and the number of electrons
• By subtracting the number of protons from the number of electrons
• By adding the number of neutrons and the number of electrons
• By subtracting the number of electrons from the number of protons