Atomic Structure and the PT Study

Which of the following subatomic particles is NOT found in the nucleus of an atom?

• Proton

• Neutron

• Electron

• All of them are found in the nucleus

How many total subatomic particles does an atom of Li-5 have?

• 5

• 10

• 8

• 2

If an elements has 2 valence electrons, it is most likely in this family.

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gases

Nitrogen has 9 neutrons and 10 electrons. What is its atomic number and mass number?

• A# = 9

  M# = 10

• A# = 7

  M# = 10

• A# = 10

  M# = 19

• A# = 7

  M# = 16

What would the charge on the nucleus of an atom be?

• Positive

• Neutral

• Negative

Answer explanation

Since the nucleus contains only protons (positively charged) and neutrons (no charge), the overall charge would be positive.

Which of the following statements only describes an atom of Boron?

• An atom with a mass number of 5

• An atom with an atomic number of 10 and a mass number of 5

• An atom with 5 neutrons

• An atom with a mass number of 11 and 6 neutrons

Which subatomic particle determines the properties of an element? (It also determines which group the element is in on the periodic table).

• Proton

• Neutron

• Electron

What is the mass number of an atom of oxygen with 9 neutrons?

• 9

• 8

• 17

• 18

This element is found in group 4, period 5 on the periodic table.

• Vanadium

• Zirconium

• Arsenic

• Tin

Typically, atoms gain or lose electrons to achieve:

• An exchange on energy

• Ionization

• A stable electron configuration (full valence shell)

• Enlightenment