11 - Atomic Theory Intro - October 13

What is the mass number or atomic mass of an atom?

• The number of protons

• The number of neutrons

• The sum of protons and neutrons

• The number of electrons

Where is the mass of an atom located?

• In the nucleus

• In the electrons

• In the protons

• In the neutrons

What are isotopes?

• Atoms of the same element with a different number of neutrons

• Atoms of the same element with a different number of protons

• Atoms of the same element with a different number of electrons

• Atoms of the same element with a different number of valence electrons

How many neutrons are there in carbon-13?

• 6

• 7

• 8

• 13

How are masses on the periodic table calculated?

• By adding the atomic masses and dividing by the number os masses totalled

• By adding the atomic number and number of neutrons

• By multiplying the masses by their abundance in nature

• By taking an average of the atomic numbers

What does the mass on the periodic table represent?

• The mass of the electrons

• The mass of the protons and neutrons

• The mass of the nucleus

• An average of the masses found in nature

Based on the information provided in the periodic table, what is the logical response for the most abundant isotope of lithium?

• Lithium-7

• Lithium-6

• Lithium-5

What is the mass of lithium-7?

• 7 amu

• 6 amu

• 8 amu

• 9 amu

What is the mass of lithium-6?

• 7 amu

• 6 amu

• 8 amu

• 9 amu

How many neutrons are in lithium-6?

• 2

• 3

• 4

• 6