Chemistry semester 1 review

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). It reflects the number of protons and neutrons in the nucleus.

Front

What is a Bohr Model?

Back

The Bohr Model is a representation of an atom that depicts electrons orbiting the nucleus in defined paths or energy levels.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the difference between protons, neutrons, and electrons?

Back

Protons are positively charged particles in the nucleus, neutrons are neutral particles also in the nucleus, and electrons are negatively charged particles that orbit the nucleus.

Front

What is a neutral atom?

Back

A neutral atom has an equal number of protons and electrons, resulting in no overall charge.

Front

How do you calculate the number of neutrons in an atom?

Back

To find the number of neutrons, subtract the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number).

Front

What is the significance of isotopes?

Back

Isotopes are variants of the same element that have the same number of protons but different numbers of neutrons, affecting their atomic mass and stability.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number, showing periodic trends in properties.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is a chemical bond?

Back

A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds.