Chem A CP Final Review

Front

What is molecular geometry?

Back

Molecular geometry refers to the three-dimensional arrangement of atoms within a molecule, determined by the number of electron groups around the central atom.

Front

How many electron groups are around the central atom in a trigonal planar geometry?

Back

3

Front

What is a chemical change?

Back

A chemical change involves a transformation that alters the chemical composition of a substance, resulting in the formation of new substances.

Front

What is an example of a chemical change?

Back

Rotting bananas.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom or ion in its gaseous state.

Front

Which element has a lower ionization energy than Scandium (Sc)?

Back

Calcium (Ca) has a lower ionization energy than Scandium.

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, zeros between significant digits, and trailing zeros in the decimal portion.

Front

How many significant figures are in the number 0.00500?

Back

3 significant figures.

Front

Which of the following is measured using significant figures: 2.30 cm, 2.3 cm, 2300 cm, or 2 cm?

Back

2.3 cm is measured using significant figures.

Front

What is the principle behind determining molecular geometry?

Back

The principle is based on the VSEPR (Valence Shell Electron Pair Repulsion) theory, which states that electron groups around a central atom will arrange themselves to minimize repulsion.