Fall Semester Final Exam

What is the charge of an electron? ________

• The charge of an electron is -1.

• The charge of an electron is +1.

• The charge of an electron is 0.

• The charge of an electron is +2.

Atomic Structure: How many protons does Silver have?

• 47

• 79

• 82

• 92

Atomic Structure: How many NEUTRONS does Chlorine-35 have?

• 16

• 17

• 18

• 19

Tags

NGSS.MS-PS1-1

How many electrons can the first energy level hold? ________ Third level? ________

• The first energy level can hold 2 electrons, and the third energy level can hold 8 electrons.

• The first energy level can hold 8 electrons, and the third energy level can hold 8 electrons.

• The first energy level can hold 2 electrons, and the third energy level can hold 32 electrons.

• The first energy level can hold 4 electrons, and the third energy level can hold 18 electrons.

Atomic Structure: What is an isotope?

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of neutrons but different numbers of protons

• Atoms with the same number of protons and neutrons

• Atoms with different numbers of protons and neutrons

Atomic Structure: How many protons, neutrons, and electrons are in a Bohr model of C-14?

• 6 protons, 8 neutrons, 6 electrons

• 7 protons, 7 neutrons, 7 electrons

• 6 protons, 6 neutrons, 6 electrons

• 8 protons, 6 neutrons, 8 electrons

Tags

NGSS.MS-PS1-1

Half-Life: Define half-life.

• The time required for a quantity to reduce to half its initial value.

• The time it takes for a radioactive substance to become completely stable.

• The time required for a chemical reaction to complete.

• The time it takes for a living organism to reach half of its lifespan.

Tags

NGSS.HS-PS1-8

Half-Life: If the half-life of a radioactive substance is 800 years, how many half-lives have passed after 2400 years?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-8

Half-Life: A radioactive substance has a half-life of 12 hours. If the initial mass of the substance is 800g, how much will remain after 36 hours?

• 100g

• 200g

• 50g

• 400g

What is the product of Beta decay of C-14?

• Nitrogen-14

• Oxygen-16

• Carbon-12

• Boron-10

Tags

NGSS.HS-PS1-8