Quiz no. 1

A water tank has a volume of 10,000 liters. Convert this volume to cubic feet. Use the conversion factor: 1 liter = 0.0353147 cubic feet.

• A) 235.42 cubic feet
• B) 280.37 cubic feet
• C) 353.15 cubic feet
• D) 400.75 cubic feet

A piece of metal has a mass of 750 grams and displaces 250 milliliters of water when submerged. Calculate the density of the metal in kilograms per cubic meter (kg/m³).

• A) 2000 kg/m³
• B) 2500 kg/m³
• C) 3000 kg/m³
• D) 3500 kg/m³

Which subatomic particle has a negligible mass and a charge of -1?

• A) Proton
• B) Neutron
• C) Electron
• D) Nucleus

What defines the identity of an element?

• A) Number of neutrons
• B) Number of protons
• C) Number of electrons
• D) Mass number

How many protons does an atom of oxygen have?

• A) 1
• B) 8
• C) 20
• D) 16

In what year did Dmitri Mendeleev organize the elements by atomic mass?

• A) 1869
• B) 1905
• C) 1913
• D) 1937

Who reorganized the periodic table by atomic number in 1913?

• A) Dmitri Mendeleev
• B) Henry Moseley
• C) Albert Einstein
• D) Marie Curie

Which of the following properties generally increases across periods and decreases down groups in the periodic table?

• A) Atomic mass
• B) Atomic radius
• C) Electronegativity
• D) Ionization energy

What is the atomic number of an element that has 20 protons?

• A) 8
• B) 16
• C) 20
• D) 40

What does the mass number of an atom represent?

• A) Number of protons
• B) Number of electrons
• C) Number of protons and neutrons
• D) Number of neutrons