4.3 Atomic Structure Quiz

What is the atomic number of an element?

• The number of neutrons
• The number of protons
• The total number of protons and neutrons

How do isotopes of an element differ?

• They have different atomic numbers
• They have different numbers of protons
• They have different numbers of neutrons

What does the mass number of an atom represent?

• The number of protons only
• The number of neutrons only
• The total number of protons and neutrons

Which of the following statements is true about a neutral atom?

• It has more protons than electrons
• It has equal numbers of protons and electrons
• It has more electrons than protons

What is the relationship between atomic number and the identity of an element?

• Atomic number can change, but the element remains the same
• Atomic number is unique to each element
• Atomic number is the same as the mass number

Tags

NGSS.HS-PS1-7

If an atom has an atomic number of 6, how many protons does it have?

• 4
• 6
• 8

Tags

NGSS.MS-PS1-1

What is the mass number of an atom with 8 protons and 10 neutrons?

• 8
• 10
• 18

Which of the following is a characteristic of isotopes?

• They have the same atomic mass
• They have different chemical properties
• They have the same number of protons

What is the atomic mass unit (amu) based on?

• The mass of hydrogen
• The mass of oxygen
• One-twelfth of the mass of a carbon-12 atom

How do you calculate the atomic mass of an element?

• Multiply the mass of each isotope by its abundance
• Use the atomic number
• Subtract the number of neutrons from the mass number