Chemistry Pre-Test Questions

Which of the following particles is found in the nucleus of an atom?

• Proton

• Neutron

• Electron

• Both Proton and Neutron

Give the mass number for an atom that has 10 protons, 10 electrons, and 11 neutrons.

• 31

• 20

• 10

• 21

Which model of the atom was proposed by Niels Bohr?

• Rutherford model

• Quantum mechanical model

• Planetary model

• Plum pudding model

What do you call atoms of the same element that have different numbers of neutrons?

• Ions

• Isotopes

• Allotropes

• Isomers

Which law relates volume and pressure at constant temperature?

• Charles’s Law

• Boyle’s Law

• Avogadro’s Law

• Gay-Lussac’s Law

What is the name given to the horizontal rows in the periodic table?

• Groups

• Rows

• Blocks

• Periods

What property generally increases as you move from right to left across a period in the periodic table?

• Atomic radius

• Ionization energy

• Electronegativity

• Electron affinity

Which of the following is a physical change?

• Rusting

• Burning

• Melting

• Decomposition

In a solution the substance that does the dissolving is called _____.

• soluble

• the solute

• the solvent

• an ion

A solution that cannot hold any more solute at room temperature would be

• a diluted solution

• a concentrated solution

• a saturated solution

• a supersaturated solution