Unit 2 Test Corrections: IPC and Chemistry: Atomic structure

Oxygen occupies the eighth spot on the periodic table. How many protons, electrons, and neutrons does oxygen-17 have, respectively?

• A. 17, 17, and 34

• B. 8, 8, and 9

• C. 8, 8, and 17

• D. 8, 9, and 9

Which are different for isotopes of the same element?

• Protons

• Electrons

• Neutrons

Hydrogen has an average atomic mass of 1.01 amu and three isotopes with masses of 1, 2, and 3 amu. Which isotope is the most abundant?

• Hydrogen-1

• Hydrogen-2

• Hydrogen-3

Cobalt-60 is one of the isotopes of cobalt and has an atomic number of 27. How many neutrons does this isotope have?

• A. 27

• B. 60

• C. 87

• D. 33

Cr + 3F ---> CrF₃ The chemical reaction has one atom of which element?

• Carbon

• Fluorine

• Chromium

• Copernicium

Which of the elements have four atoms participating in the chemical reaction where methane gas is burning in oxygen?

• Carbon

• Cobalt

• Hydrogen

• Helium

• Oxygen

The chemical reaction for the formation of rust is shown above. How many of which atoms take place in this chemical reaction?

• Four iron atoms and six oxygen atoms.

• Four fluorine atoms, four erbium atoms, and six oxygen atoms.

• Four fermium atoms and six oxygen atoms.

• Four iron atoms and three oxygen atoms.

Label the parts of the atom matching the correct term with the letter label.

• Neutron

• A

• Proton

• D

• Nucleus

• B

• Orbital

• E

• Electron

• C

The gold-foil experiment was performed by Rutherford and led to the discovery of the --

• Neutron.

• Electron.

• Nucleus.

• Proton.

Thomson used a cathode-ray tube in his experiments that led to the discovery of the presence and charge of the --

• Neutron.

• Proton.

• Nucleus.

• Electron.