Chemistry of Life

The atomic number of an element is defined as the number of what?

• Neutrons

• Electrons

• Protons

• Ions

An atom of phosphorus contains which of the following?

• Protons, neutrons, and electrons

• Only protons and electrons

• Only neutrons and electrons

• Only protons and neutrons

Tags

NGSS.MS-PS1-1

The movement of water upward from the roots to the leaves is partially due to which property of water?

• Adhesion

• Cohesion

• Evaporation

• Condensation

Which of the following is a property of water that helps it move through plants?

• Density

• Cohesion

• Viscosity

• Solubility

What are the properties of water?

• Water is non-polar and hydrophobic.

• Water has a high heat capacity and is a good solvent.

• Water is a poor solvent and has low surface tension.

• Water is non-polar and has low heat capacity.

Tags

NGSS.MS-PS3-4

What type of molecules are water molecules?

• Non-polar covalent molecules.

• Polar covalent molecules.

• Ionic molecules.

• Metallic molecules.

What is the result of the uneven distribution of electrons in water molecules?

• Formation of ionic bonds.

• Formation of metallic bonds.

• Formation of hydrogen bonds.

• Formation of covalent bonds.

During an experiment, which factors are observed and measured?

• Independent Variables

• Dependent Variables

• Control Variables

• Random Variables

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

Which type of bond is primarily responsible for the unique properties of water?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

What is an atom?

• Basic unit of matter

• Has a positive charge and is found in the nucleus

• Contains different numbers of neutrons

• Has a neutral charge and can be found in the nucleus

Tags

NGSS.MS-PS1-1