Exploring Ionic Bonding and Energy Levels

What happens to the sodium atom when it loses an electron?

• It remains neutral.

• It becomes a positively charged ion.

• It becomes a negatively charged ion.

• It gains a proton.

Why does chlorine become a negatively charged ion in the formation of sodium chloride?

• It gains a proton.

• It loses an electron.

• It gains an electron.

• It loses a proton.

What is the charge of the chloride ion in a sodium chloride crystal?

• Neutral

• Positive

• It varies

• Negative

What is used to prevent the flask from cracking during the reaction between sodium metal and chlorine gas?

• Water

• Sand

• Glass beads

• Ice

What type of reaction occurs when sodium metal reacts with chlorine gas?

• Endothermic

• No reaction

• Exothermic

• Neutral

How many electrons does calcium lose when forming calcium chloride?

• Four

• Three

• Two

• One

What is the chemical formula for calcium chloride?

• CaCl

• CaCl2

• Ca2Cl2

• Ca2Cl

In the context of NGSS, what do students develop to describe the atomic composition of molecules?

• Experiments

• Presentations

• Models

• Essays

What is the performance expectation code mentioned in the lesson for developing models?

• MS-PS2-1

• MS-PS1-1

• MS-PS3-1

• MS-PS4-1

What type of structure does sodium chloride form at the macroscopic scale?

• Cubic

• Amorphous

• Spherical

• Hexagonal