Chemistry Semester 1 Exam Review

The closeness of a measurement to its true value is a measure of its:

• Usefulness

• Precision

• Accuracy

• Reproducibility

The metric unit of volume is:

• L

• mg

• km

• K

The number of neutrons in the nucleus of an atom can be calculated by:

• electrons + protons

• electrons - protons

• mass number - protons

• mass number + protons

Atomic masses are measured in:

• nanograms

• grams

• angstroms

• amu

Which of the following is a metalloid?

• As

• O

• Br

• Kr

What is the term for quanta of light?

• Charms

• Excitons

• Muons

• Photon

Tags

NGSS.HS-PS4-3

The distance between two consecutive peaks or troughs in a wave is:

• Frequency

• Wavelength

• Quantization

• Photon

Tags

NGSS.HS-PS4-1

Who developed a quantum model for the hydrogen atom?

• Rutherford

• Albert Einstein

• Niels Bohr

• Max Planck

Which scientists contributed to the development of quantum mechanics?

• Werner Heisenberg

• Louis de Broglie

• Max Planck

• Erwin Schrodinger

In a given atom, no two electrons can have the same set of four quantum numbers. This is known as:

• Probability distribution

• Radial probability distribution

• Quantum mechanical model

• Pauli exclusion principle