Chapter 2: Chemistry of Life

What is the simplest type of matter according to the document?

• Compound

• Molecule

• Element

• Atom

What charge does a neutron have?

• Positive

• Negative

• No charge

• Variable charge

Which type of chemical bond involves the exchange of electrons between atoms?

• Covalent bonding

• Metallic bonding

• Ionic bonding

• Hydrogen bonding

What is the main characteristic of ions in ionic bonding?

• Ions are always neutral

• Ions share electrons equally

• Ions are either positively or negatively charged

• Ions do not interact with each other

How do atoms achieve stability in covalent bonding?

• By transferring electrons

• By sharing electron pairs

• By exchanging protons

• By isolating electrons

Tags

NGSS.HS-PS1-1

What type of covalent bond involves two atoms sharing two pairs of electrons?

• Single covalent bond

• Double covalent bond

• Polar covalent bond

• Nonpolar covalent bond

In a nonpolar covalent bond, how are the electrons shared between atoms?

• Equally, because the nuclei attract the electrons equally

• Unequally, because one nucleus attracts the electrons more than the other

• Not shared at all, electrons remain with their original atoms

• Randomly, without any specific pattern

Which statement best describes the Van der Waals interactions?

• Strong electrical interactions between molecules that are far apart

• Inducing electrical interactions between two or more atoms that are close to one another

• Chemical bonds forming between charged atoms

• Permanent interactions that result in the formation of new molecules

What is the primary characteristic of hydrogen bonds compared to covalent bonds?

• Hydrogen bonds are generally stronger than covalent bonds

• Hydrogen bonds involve the sharing of electron pairs

• Hydrogen bonds are formed due to the attraction between a positively charged part of one molecule and a negatively charged part of another

• Hydrogen bonds result in the permanent transfer of electrons

What is the definition of solubility as mentioned in the document?

• The ability of a substance to increase temperature when dissolved.

• The ability of a substance to dissolve in another substance.

• The ability of a substance to react chemically with water.

• The ability of a substance to change color when dissolved.