Atoms, Molecules, Compounds, and Ions

Which of the following substances is composed of atoms?

• Neon

• CO2

• Sulfur Hexafluoride

• H2O

Tags

NGSS.MS-PS1-1

Which of the following is a pure element?

• Neon

• H2O

• Sodium Chloride

• CO2

What is the difference between an atom and an ion?

• Atoms contain different number of protons and electrons, while ions contain equal number of protons and electrons

• Atoms are electrically neutral, while ions contain different number of protons and electrons

• Atoms contain different number of protons and electrons, while ions are electrically neutral

• Atoms contain equal number of protons and electrons, while ions contain different number of protons and electrons

Which of the following compounds is ionic?

• Ammonium Chloride

• Sulfur Hexafluoride

• Carbon Monoxide

• Water

Tags

NGSS.HS-PS1-3

What is the difference between ionic and covalent compounds?

• Ionic compounds are electrically neutral, while covalent compounds contain different number of protons and electrons

• In ionic compounds, electrons are shared between atoms, while in covalent compounds, there is a transfer of electrons

• Ionic compounds are composed of metals and nonmetals, while covalent compounds are composed of nonmetals

• Ionic compounds contain equal number of protons and electrons, while covalent compounds contain different number of protons and electrons

Which of the following is an exception to the general rule of ionic and covalent compounds?

• Carbon Monoxide

• Calcium Oxide

• Ammonium Chloride

• Sodium Chloride

What is the charge of the ammonium ion?

• Positive one

• Negative one

• Positive two

• Negative two

How many neutrons are present in the aluminum atom and the aluminum ion?

• 15

• 14

• 13

• 12