Atomic Structure and Subatomic Particles Quiz

What is the charge of a proton?

• Positive

• Negative

• Neutral

• Double positive

Which statement is true about the electrons in a 2+ ion formed from this atom?

• The ion has more electrons than the atom

• The ion has the same number of electrons as the atom

• The ion has two fewer electrons than the atom

• The ion has two more electrons than the atom

If two atoms have the same number of protons but different numbers of neutrons, what are they called?

• Isotopes

• Ions

• Isomers

• Allotropes

What is the main purpose of simple distillation in the laboratory?

• To separate solids from liquids

• To obtain pure liquid from a solution

• To measure temperature

• To mix chemicals

If the water in the condenser stopped flowing, what would most likely happen?

• The solution would freeze

• The vapor would not condense properly

• The flask would break

• The solution would evaporate faster

Why is a conical flask used to collect the distillate in simple distillation?

• It is easy to heat

• It prevents spillage and allows easy collection

• It measures temperature

• It increases the boiling point

Which statement best describes the bonding in SiO₂?

• Each silicon atom forms single bonds with two oxygen atoms

• Each silicon atom forms double bonds with two oxygen atoms

• Each silicon atom forms single bonds with four oxygen atoms

• Each silicon atom forms single bonds with three oxygen atoms

Which of the following statements is true about the melting point of silicon hydride?

• It has a low melting point due to weak intermolecular forces

• It has a high melting point due to strong covalent bonds

• It has a high melting point due to metallic bonding

• It has a low melting point due to ionic bonds

Which of the following is a property of substances with simple molecular structures?

• Low melting and boiling points

• High melting and boiling points

• Conduct electricity in solid state

• Are always soluble in water

Which of the following is a difference between silicon hydride and silicon dioxide?

• Silicon hydride has a simple molecular structure, silicon dioxide has a giant covalent structure

• Both have giant covalent structures

• Both have simple molecular structures

• Both are metals