Chemistry Quiz

Element X is in Group 2 and element Y is in Group 17. What happens when a compound is formed between these two atoms?

• X loses electrons to Y to form an ionic bond.

• X loses electrons to Y to form a covalent bond.

• X gains electrons from Y to form an ionic bond.

• X gains electrons from Y to form a covalent bond.

The forces between atoms that create chemical bonds are the result of interactions between

• nuclei

• electrons

• protons and electrons

• protons and nuclei

Which statement best describes the substance that results when electrons are transferred from a metal to a nonmetal?

• It contains ionic bonds and has a low melting point.

• It contains ionic bonds and has a high melting point.

• It contains covalent bonds and has a low melting point.

• It contains covalent bonds and has a high melting point.

Potassium phosphate, K₃PO₄, is a source of dietary potassium found in a popular cereal. Identify two types of chemical bonding in the source of dietary potassium in this cereal.

• Ionic and covalent

• Metallic and covalent

• Ionic and metallic

• Covalent and hydrogen

A periodic wave travels through a rope, as shown in the diagram. As the wave travels, what is transferred between points A and B?

• mass, only

• energy, only

• both mass and energy

• neither mass nor energy

What does the use of a television remote control illustrate about electromagnetic radiation?

• is a longitudinal wave

• possesses energy inversely proportional to its frequency

• diffracts and accelerates in air

• transfers energy without transferring mass

How many protons does a U-235 atom have?

• 91

• 92

• 93

• 94

What is the number of neutrons in a U-235 atom?

• 141

• 142

• 143

• 144

Which of the following atoms have the same number of protons but different numbers of neutrons?

• C-12 and C-14

• U-235 and U-238

• H-1 and H-2

• O-16 and O-18

What is the difference in the number of neutrons between U-235 and U-238?

• Two

• Three

• Four

• Five