Semester Midterm - FALL - '24

In the image, the gray circles located on the rings of the model are meant to represent what subatomic particle and charge?

• Proton; positive

• Neutron; negative

• Electron; negative

• Proton; neutral

Where is most of the mass of an atom, within the nucleus or outside of the nucleus?

• Within the nucleus because electrons are very small and contribute little to the mass of the atom.

• Outside the nucleus because protons are the most massive subatomic particles.

• Within the nucleus because neutrons are very small and contribute little to the mass of the atom.

• Outside the nucleus because electrons are the most massive subatomic article.

What is the symbol for the element whose atom contains 3 protons, 4 neutrons, and 3 electrons?

• Be

• Li

• N

• Ne

Which of the following is the correct model for Beryllium (Be)?

• 2P, 2N

• 3P, 4N

• 4P, 5N

• 9P, 10N

What is the correct subatomic makeup for Iodine?

• 127 protons, 53 electrons, 74 neutrons

• 53 protons, 53 electrons, 53 neutrons

• 53 protons, 53 electrons, 74 neutrons

• 127 protons, 126 electrons, 53 neutrons

• 179 protons, 126 electrons, 53 neutrons

In what period and group is Aluminum located?

• 3; 13

• 13; 3

• 2; 13

• 13; 2

Which group is one electron (plus or minus) away from a full outer shell?

• Group 2

• Group 16

• Group 17

• Group 18

Which group is one electron (plus or minus) away from a full outer shell?

• Group 1

• Group 2

• Group 16

• Group 18

Which of the following would most likely form a bond with Sodium?

• Magnesium

• Potassium

• Chlorine

• Argon

What determines stability for an atom?

• Number of protons

• Number of total subatomic particles

• Number of valence electrons

• Number of total electrons