Learning Goal 4: Mastery Check

Which subatomic particle is found in the nucleus and has no charge?

• Proton
• Neutron
• Electron

The major portion of an atom's mass consists of

• electrons and protons
• electrons and neutrons
• neutrons and protons

Which statement describes the distribution of charge in an atom?

• A neutral nucleus is surrounded by one or more negatively charged electrons
• A neutral nucleus is surrounded by one or more positively charged electrons
• A positively charged nucleus is surrounded by one or more negatively charged electrons
• A positively charged nucleus is surrounded by one or more positively charged electrons

Electrons in the outermost energy level are called...

• neutral electrons
• valence electrons
• inside electrons

What is the mass number of an atom that has 10 protons, 20 neutrons, and 15 electrons?

• 20

• 25

• 35

• 30

Which statement provides information about the identity of the element?

• The atom has 7 protons

• The atom has 7 neutrons

• The difference between the number of neutrons and protons is 7

Every Hydrogen atom has

• 2 electrons

• 0 neutrons

• an atomic number of 1

• a mass of 1

The atomic number of an elment is 120. How many electrons are there in an atom of of this element?

• 120

• 12

• 60

• Not enough information is provided

Which group contains the noble gas family?

• Group 1
• Group 2
• Group 17
• Group 18

Which elements are as reactive as Alkali Metals?

• Alkaline Earth Metals
• Halogens
• Nobel Gases
• Transition Metals