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 Blanks

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 Blanks

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 Blanks

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