Flashcardizz- Test: Chemistry

Front

What is the atomic model for Boron?

Back

The atomic model for Boron includes 5 protons, 5 neutrons, and 5 electrons, typically represented in the Bohr model with electrons in specific energy levels.

Front

What is a characteristic of a molecule?

Back

A molecule is defined as 2 or more atoms bonded together, which can involve sharing electrons (covalent bonds). Examples include O2 and H2O.

Front

Which substances are least likely to dissolve in water?

Back

Nonpolar fats and oils are least likely to dissolve in water due to their nonpolar nature, which does not interact favorably with polar water molecules.

Front

What is the pH range of human blood?

Back

Human blood has a pH range between 7.35 and 7.45, which is slightly basic.

Front

What does a higher concentration of hydroxide ions (OH-) indicate?

Back

A higher concentration of hydroxide ions (OH-) in a solution indicates a stronger base.

Front

Define a covalent bond.

Back

A covalent bond is a type of chemical bond where two atoms share one or more pairs of electrons.

Front

What is the difference between polar and nonpolar molecules?

Back

Polar molecules have a partial positive charge on one end and a partial negative charge on the other, while nonpolar molecules have an even distribution of charge.

Front

What is the significance of pH in solutions?

Back

pH measures the acidity or basicity of a solution, with lower values indicating acidity and higher values indicating basicity.

Front

What is an example of a polar molecule?

Back

Water (H2O) is an example of a polar molecule due to its bent shape and the difference in electronegativity between hydrogen and oxygen.

Front

What is the role of sodium ions (Na+) and chloride ions (Cl-) in salt?

Back

Sodium ions (Na+) and chloride ions (Cl-) combine to form sodium chloride (NaCl), which is table salt, and they are held together by ionic bonds.