Chemistry of life notes

Multiple Choice

Which of the following elements is NOT one of the six elements necessary for life?

• Carbon

• Hydrogen

• Calcium

• Phosphorus

Multiple Choice

Which subatomic particle is found in the nucleus and has no charge?

• Proton

• Neutron

• Electron

• Positron

Multiple Select

Which of the following information can you obtain from the periodic table of elements?

• Element's symbol

• Number of protons

• Average atomic mass

• Number of valence electrons

Fill in the Blank

The electrons in the outermost energy level of an atom are called ___ electrons.

Multiple Choice

What does the group number on the periodic table indicate about an atom?

• Number of protons

• Number of neutrons

• Number of valence electrons

• Number of energy levels

Multiple Select

Which of the following statements about cations and anions are correct?

• A cation forms when an atom loses an electron.

• An anion forms when an atom gains an electron.

• A cation is negatively charged.

• An anion is positively charged.

Multiple Choice

Which type of bond involves the sharing of electrons between nonmetallic atoms?

• Covalent bond

• Ionic bond

• Hydrogen bond

• Metallic bond

Fill in the Blank

Water is a ___ molecule, which means it has an unequal distribution of charges.

Multiple Choice

Which of the following best describes the difference between covalent bonds and hydrogen bonds in water molecules?

• Covalent bonds hold atoms together within a water molecule, while hydrogen bonds hold different water molecules together.

• Hydrogen bonds hold atoms together within a water molecule, while covalent bonds hold different water molecules together.

• Both covalent and hydrogen bonds hold atoms together within a water molecule.

• Both covalent and hydrogen bonds hold different water molecules together.

Multiple Choice

Which property of water is responsible for the formation of droplets on a spider web, as shown in the image?

• Cohesion

• Adhesion

• High specific heat

• Solubility

Multiple Choice

Which of the following best describes adhesion?

• Attraction between molecules of different substances

• Attraction between molecules of the same substance

• Water's ability to resist temperature change

• Water's ability to dissolve substances

Fill in the Blank

Solid water (ice) is ___ dense than liquid water.

Multiple Select

Which of the following statements about water as a solvent are correct?

• Water dissolves more substances than any other liquid.

• Water's polarity helps it dissolve substances.

• Water cannot dissolve solids like salt or sugar.

• Water is considered the universal solvent.

Multiple Choice

A substance that does NOT dissolve in water and is described as 'water fearing' is called:

• Hydrophilic

• Hydrophobic

• Solute

• Solvent

Multiple Choice

Which of the following is considered the most basic unit of life?

• Organ

• Tissue

• Cell

• Organ System